diff --git a/include/gmock/gmock-matchers.h b/include/gmock/gmock-matchers.h
index 7266fba7..688ce64f 100644
--- a/include/gmock/gmock-matchers.h
+++ b/include/gmock/gmock-matchers.h
@@ -1623,7 +1623,7 @@ struct CallableTraits<ResType(*)(ArgType)> {
   typedef ResType(*StorageType)(ArgType);
 
   static void CheckIsValid(ResType(*f)(ArgType)) {
-    GMOCK_CHECK_(f != NULL)
+    GTEST_CHECK_(f != NULL)
         << "NULL function pointer is passed into ResultOf().";
   }
   template <typename T>
@@ -1934,6 +1934,94 @@ class KeyMatcher {
   const M matcher_for_key_;
 };
 
+// Implements Pair(first_matcher, second_matcher) for the given argument pair
+// type with its two matchers. See Pair() function below.
+template <typename PairType>
+class PairMatcherImpl : public MatcherInterface<PairType> {
+ public:
+  typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(PairType)) RawPairType;
+  typedef typename RawPairType::first_type FirstType;
+  typedef typename RawPairType::second_type SecondType;
+
+  template <typename FirstMatcher, typename SecondMatcher>
+  PairMatcherImpl(FirstMatcher first_matcher, SecondMatcher second_matcher)
+      : first_matcher_(
+            testing::SafeMatcherCast<const FirstType&>(first_matcher)),
+        second_matcher_(
+            testing::SafeMatcherCast<const SecondType&>(second_matcher)) {
+  }
+
+  // Returns true iff 'a_pair.first' matches first_matcher and 'a_pair.second'
+  // matches second_matcher.
+  virtual bool Matches(PairType a_pair) const {
+    return first_matcher_.Matches(a_pair.first) &&
+           second_matcher_.Matches(a_pair.second);
+  }
+
+  // Describes what this matcher does.
+  virtual void DescribeTo(::std::ostream* os) const {
+    *os << "has a first field that ";
+    first_matcher_.DescribeTo(os);
+    *os << ", and has a second field that ";
+    second_matcher_.DescribeTo(os);
+  }
+
+  // Describes what the negation of this matcher does.
+  virtual void DescribeNegationTo(::std::ostream* os) const {
+    *os << "has a first field that ";
+    first_matcher_.DescribeNegationTo(os);
+    *os << ", or has a second field that ";
+    second_matcher_.DescribeNegationTo(os);
+  }
+
+  // Explains why 'a_pair' matches, or doesn't match, this matcher.
+  virtual void ExplainMatchResultTo(PairType a_pair,
+                                    ::std::ostream* os) const {
+    ::std::stringstream ss1;
+    first_matcher_.ExplainMatchResultTo(a_pair.first, &ss1);
+    internal::string s1 = ss1.str();
+    if (s1 != "") {
+       s1 = "the first field " + s1;
+    }
+
+    ::std::stringstream ss2;
+    second_matcher_.ExplainMatchResultTo(a_pair.second, &ss2);
+    internal::string s2 = ss2.str();
+    if (s2 != "") {
+       s2 = "the second field " + s2;
+    }
+
+    *os << s1;
+    if (s1 != "" && s2 != "") {
+       *os << ", and ";
+    }
+    *os << s2;
+  }
+
+ private:
+  const Matcher<const FirstType&> first_matcher_;
+  const Matcher<const SecondType&> second_matcher_;
+};
+
+// Implements polymorphic Pair(first_matcher, second_matcher).
+template <typename FirstMatcher, typename SecondMatcher>
+class PairMatcher {
+ public:
+  PairMatcher(FirstMatcher first_matcher, SecondMatcher second_matcher)
+      : first_matcher_(first_matcher), second_matcher_(second_matcher) {}
+
+  template <typename PairType>
+  operator Matcher<PairType> () const {
+    return MakeMatcher(
+        new PairMatcherImpl<PairType>(
+            first_matcher_, second_matcher_));
+  }
+
+ private:
+  const FirstMatcher first_matcher_;
+  const SecondMatcher second_matcher_;
+};
+
 // Implements ElementsAre() and ElementsAreArray().
 template <typename Container>
 class ElementsAreMatcherImpl : public MatcherInterface<Container> {
@@ -2632,6 +2720,18 @@ inline internal::KeyMatcher<M> Key(M inner_matcher) {
   return internal::KeyMatcher<M>(inner_matcher);
 }
 
+// Pair(first_matcher, second_matcher) matches a std::pair whose 'first' field
+// matches first_matcher and whose 'second' field matches second_matcher.  For
+// example, EXPECT_THAT(map_type, ElementsAre(Pair(Ge(5), "foo"))) can be used
+// to match a std::map<int, string> that contains exactly one element whose key
+// is >= 5 and whose value equals "foo".
+template <typename FirstMatcher, typename SecondMatcher>
+inline internal::PairMatcher<FirstMatcher, SecondMatcher>
+Pair(FirstMatcher first_matcher, SecondMatcher second_matcher) {
+  return internal::PairMatcher<FirstMatcher, SecondMatcher>(
+      first_matcher, second_matcher);
+}
+
 // Returns a predicate that is satisfied by anything that matches the
 // given matcher.
 template <typename M>
diff --git a/include/gmock/internal/gmock-port.h b/include/gmock/internal/gmock-port.h
index 6bee9966..0263491e 100644
--- a/include/gmock/internal/gmock-port.h
+++ b/include/gmock/internal/gmock-port.h
@@ -214,56 +214,6 @@ typedef ::wstring wstring;
 typedef ::std::wstring wstring;
 #endif  // GTEST_HAS_GLOBAL_WSTRING
 
-// Prints the file location in the format native to the compiler.
-inline void FormatFileLocation(const char* file, int line, ::std::ostream* os) {
-  if (file == NULL)
-    file = "unknown file";
-  if (line < 0) {
-    *os << file << ":";
-  } else {
-#if _MSC_VER
-    *os << file << "(" << line << "):";
-#else
-    *os << file << ":" << line << ":";
-#endif
-  }
-}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE.
-//
-// GMOCK_CHECK_ is an all mode assert. It aborts the program if the condition
-// is not satisfied.
-//  Synopsys:
-//    GMOCK_CHECK_(boolean_condition);
-//     or
-//    GMOCK_CHECK_(boolean_condition) << "Additional message";
-//
-//    This checks the condition and if the condition is not satisfied
-//    it prints message about the condition violation, including the
-//    condition itself, plus additional message streamed into it, if any,
-//    and then it aborts the program. It aborts the program irrespective of
-//    whether it is built in the debug mode or not.
-
-class GMockCheckProvider {
- public:
-  GMockCheckProvider(const char* condition, const char* file, int line) {
-    FormatFileLocation(file, line, &::std::cerr);
-    ::std::cerr << " ERROR: Condition " << condition << " failed. ";
-  }
-  ~GMockCheckProvider() {
-    ::std::cerr << ::std::endl;
-    posix::Abort();
-  }
-  ::std::ostream& GetStream() { return ::std::cerr; }
-};
-#define GMOCK_CHECK_(condition) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (condition) \
-      ; \
-    else \
-      ::testing::internal::GMockCheckProvider(\
-          #condition, __FILE__, __LINE__).GetStream()
-
 }  // namespace internal
 }  // namespace testing
 
diff --git a/src/gmock-spec-builders.cc b/src/gmock-spec-builders.cc
index 94ba24bb..72558658 100644
--- a/src/gmock-spec-builders.cc
+++ b/src/gmock-spec-builders.cc
@@ -203,8 +203,8 @@ class MockObjectRegistry {
       // This can help the user identify the leaked object.
       std::cout << "\n";
       const MockObjectState& state = it->second;
-      internal::FormatFileLocation(
-          state.first_used_file, state.first_used_line, &std::cout);
+      std::cout << internal::FormatFileLocation(state.first_used_file,
+                                                state.first_used_line);
       std::cout << " ERROR: this mock object";
       if (state.first_used_test != "") {
         std::cout << " (used in test " << state.first_used_test_case << "."
diff --git a/test/gmock-matchers_test.cc b/test/gmock-matchers_test.cc
index 8926e944..ef878898 100644
--- a/test/gmock-matchers_test.cc
+++ b/test/gmock-matchers_test.cc
@@ -42,6 +42,7 @@
 #include <set>
 #include <sstream>
 #include <string>
+#include <utility>
 #include <vector>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
@@ -91,6 +92,7 @@ using testing::NanSensitiveFloatEq;
 using testing::Ne;
 using testing::Not;
 using testing::NotNull;
+using testing::Pair;
 using testing::Pointee;
 using testing::PolymorphicMatcher;
 using testing::Property;
@@ -126,6 +128,35 @@ using testing::MatchesRegex;
 using testing::internal::RE;
 #endif  // GMOCK_HAS_REGEX
 
+// For testing ExplainMatchResultTo().
+class GreaterThanMatcher : public MatcherInterface<int> {
+ public:
+  explicit GreaterThanMatcher(int rhs) : rhs_(rhs) {}
+
+  virtual bool Matches(int lhs) const { return lhs > rhs_; }
+
+  virtual void DescribeTo(::std::ostream* os) const {
+    *os << "is greater than " << rhs_;
+  }
+
+  virtual void ExplainMatchResultTo(int lhs, ::std::ostream* os) const {
+    const int diff = lhs - rhs_;
+    if (diff > 0) {
+      *os << "is " << diff << " more than " << rhs_;
+    } else if (diff == 0) {
+      *os << "is the same as " << rhs_;
+    } else {
+      *os << "is " << -diff << " less than " << rhs_;
+    }
+  }
+ private:
+  const int rhs_;
+};
+
+Matcher<int> GreaterThan(int n) {
+  return MakeMatcher(new GreaterThanMatcher(n));
+}
+
 // Returns the description of the given matcher.
 template <typename T>
 string Describe(const Matcher<T>& m) {
@@ -899,6 +930,90 @@ TEST(KeyTest, InsideContainsUsingMultimap) {
   EXPECT_THAT(container, Not(Contains(Key(3))));
 }
 
+TEST(PairTest, Typing) {
+  // Test verifies the following type conversions can be compiled.
+  Matcher<const std::pair<const char*, int>&> m1 = Pair("foo", 42);
+  Matcher<const std::pair<const char*, int> > m2 = Pair("foo", 42);
+  Matcher<std::pair<const char*, int> > m3 = Pair("foo", 42);
+
+  Matcher<std::pair<int, const std::string> > m4 = Pair(25, "42");
+  Matcher<std::pair<const std::string, int> > m5 = Pair("25", 42);
+}
+
+TEST(PairTest, CanDescribeSelf) {
+  Matcher<const std::pair<std::string, int>&> m1 = Pair("foo", 42);
+  EXPECT_EQ("has a first field that is equal to \"foo\""
+            ", and has a second field that is equal to 42",
+            Describe(m1));
+  EXPECT_EQ("has a first field that is not equal to \"foo\""
+            ", or has a second field that is not equal to 42",
+            DescribeNegation(m1));
+  // Double and triple negation (1 or 2 times not and description of negation).
+  Matcher<const std::pair<int, int>&> m2 = Not(Pair(Not(13), 42));
+  EXPECT_EQ("has a first field that is not equal to 13"
+            ", and has a second field that is equal to 42",
+            DescribeNegation(m2));
+}
+
+TEST(PairTest, CanExplainMatchResultTo) {
+  const Matcher<std::pair<int, int> > m0 = Pair(0, 0);
+  EXPECT_EQ("", Explain(m0, std::make_pair(25, 42)));
+
+  const Matcher<std::pair<int, int> > m1 = Pair(GreaterThan(0), 0);
+  EXPECT_EQ("the first field is 25 more than 0",
+            Explain(m1, std::make_pair(25, 42)));
+
+  const Matcher<std::pair<int, int> > m2 = Pair(0, GreaterThan(0));
+  EXPECT_EQ("the second field is 42 more than 0",
+            Explain(m2, std::make_pair(25, 42)));
+
+  const Matcher<std::pair<int, int> > m3 = Pair(GreaterThan(0), GreaterThan(0));
+  EXPECT_EQ("the first field is 25 more than 0"
+            ", and the second field is 42 more than 0",
+            Explain(m3, std::make_pair(25, 42)));
+}
+
+TEST(PairTest, MatchesCorrectly) {
+  std::pair<int, std::string> p(25, "foo");
+
+  // Both fields match.
+  EXPECT_THAT(p, Pair(25, "foo"));
+  EXPECT_THAT(p, Pair(Ge(20), HasSubstr("o")));
+
+  // 'first' doesnt' match, but 'second' matches.
+  EXPECT_THAT(p, Not(Pair(42, "foo")));
+  EXPECT_THAT(p, Not(Pair(Lt(25), "foo")));
+
+  // 'first' matches, but 'second' doesn't match.
+  EXPECT_THAT(p, Not(Pair(25, "bar")));
+  EXPECT_THAT(p, Not(Pair(25, Not("foo"))));
+
+  // Neither field matches.
+  EXPECT_THAT(p, Not(Pair(13, "bar")));
+  EXPECT_THAT(p, Not(Pair(Lt(13), HasSubstr("a"))));
+}
+
+TEST(PairTest, SafelyCastsInnerMatchers) {
+  Matcher<int> is_positive = Gt(0);
+  Matcher<int> is_negative = Lt(0);
+  std::pair<char, bool> p('a', true);
+  EXPECT_THAT(p, Pair(is_positive, _));
+  EXPECT_THAT(p, Not(Pair(is_negative, _)));
+  EXPECT_THAT(p, Pair(_, is_positive));
+  EXPECT_THAT(p, Not(Pair(_, is_negative)));
+}
+
+TEST(PairTest, InsideContainsUsingMap) {
+  std::map<int, std::string> container;
+  container.insert(std::make_pair(1, "foo"));
+  container.insert(std::make_pair(2, "bar"));
+  container.insert(std::make_pair(4, "baz"));
+  EXPECT_THAT(container, Contains(Pair(1, "foo")));
+  EXPECT_THAT(container, Contains(Pair(1, _)));
+  EXPECT_THAT(container, Contains(Pair(_, "foo")));
+  EXPECT_THAT(container, Not(Contains(Pair(3, _))));
+}
+
 // Tests StartsWith(s).
 
 TEST(StartsWithTest, MatchesStringWithGivenPrefix) {
@@ -2150,35 +2265,6 @@ TEST(PointeeTest, CanDescribeSelf) {
             DescribeNegation(m));
 }
 
-// For testing ExplainMatchResultTo().
-class GreaterThanMatcher : public MatcherInterface<int> {
- public:
-  explicit GreaterThanMatcher(int rhs) : rhs_(rhs) {}
-
-  virtual bool Matches(int lhs) const { return lhs > rhs_; }
-
-  virtual void DescribeTo(::std::ostream* os) const {
-    *os << "is greater than " << rhs_;
-  }
-
-  virtual void ExplainMatchResultTo(int lhs, ::std::ostream* os) const {
-    const int diff = lhs - rhs_;
-    if (diff > 0) {
-      *os << "is " << diff << " more than " << rhs_;
-    } else if (diff == 0) {
-      *os << "is the same as " << rhs_;
-    } else {
-      *os << "is " << -diff << " less than " << rhs_;
-    }
-  }
- private:
-  const int rhs_;
-};
-
-Matcher<int> GreaterThan(int n) {
-  return MakeMatcher(new GreaterThanMatcher(n));
-}
-
 TEST(PointeeTest, CanExplainMatchResult) {
   const Matcher<const string*> m = Pointee(StartsWith("Hi"));
 
diff --git a/test/gmock-port_test.cc b/test/gmock-port_test.cc
index 7335405c..9a64ec33 100644
--- a/test/gmock-port_test.cc
+++ b/test/gmock-port_test.cc
@@ -36,61 +36,4 @@
 #include <gmock/internal/gmock-port.h>
 #include <gtest/gtest.h>
 
-TEST(GmockCheckSyntaxTest, BehavesLikeASingleStatement) {
-  if (false)
-    GMOCK_CHECK_(false) << "This should never be executed; "
-                           "It's a compilation test only.";
-
-  if (true)
-    GMOCK_CHECK_(true);
-  else
-    ;
-
-  if (false)
-    ;
-  else
-    GMOCK_CHECK_(true) << "";
-}
-
-TEST(GmockCheckSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      GMOCK_CHECK_(true);
-  }
-
-  switch(0)
-    case 0:
-      GMOCK_CHECK_(true) << "Check failed in switch case";
-}
-
-TEST(GmockCheckDeathTest, DiesWithCorrectOutputOnFailure) {
-  const bool a_false_condition = false;
-  // MSVC and gcc use different formats to print source file locations.
-  // Google Mock's failure messages use the same format as used by the
-  // compiler, in order for the IDE to recognize them.  Therefore we look
-  // for different patterns here depending on the compiler.
-  const char regex[] =
-#ifdef _MSC_VER
-     "gmock-port_test\\.cc\\(\\d+\\):"
-#else
-     "gmock-port_test\\.cc:[0-9]+"
-#endif  // _MSC_VER
-     ".*a_false_condition.*Extra info";
-
-  EXPECT_DEATH_IF_SUPPORTED(GMOCK_CHECK_(a_false_condition) << "Extra info",
-                            regex);
-}
-
-#if GTEST_HAS_DEATH_TEST
-
-TEST(GmockCheckDeathTest, LivesSilentlyOnSuccess) {
-  EXPECT_EXIT({
-      GMOCK_CHECK_(true) << "Extra info";
-      ::std::cerr << "Success\n";
-      exit(0); },
-      ::testing::ExitedWithCode(0), "Success");
-}
-
-#endif  // GTEST_HAS_DEATH_TEST
+// This file intentionally contains no test at this moment.