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diff --git a/testing/gmock/src/gmock-spec-builders.cc b/testing/gmock/src/gmock-spec-builders.cc
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+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: wan@google.com (Zhanyong Wan)
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements the spec builder syntax (ON_CALL and
+// EXPECT_CALL).
+
+#include <gmock/gmock-spec-builders.h>
+
+#include <stdlib.h>
+#include <iostream>  // NOLINT
+#include <map>
+#include <set>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
+#include <unistd.h>  // NOLINT
+#endif
+
+namespace testing {
+namespace internal {
+
+// Protects the mock object registry (in class Mock), all function
+// mockers, and all expectations.
+Mutex g_gmock_mutex(Mutex::NO_CONSTRUCTOR_NEEDED_FOR_STATIC_MUTEX);
+
+// Constructs an ExpectationBase object.
+ExpectationBase::ExpectationBase(const char* file, int line)
+    : file_(file),
+      line_(line),
+      cardinality_specified_(false),
+      cardinality_(Exactly(1)),
+      call_count_(0),
+      retired_(false) {
+}
+
+// Destructs an ExpectationBase object.
+ExpectationBase::~ExpectationBase() {}
+
+// Explicitly specifies the cardinality of this expectation.  Used by
+// the subclasses to implement the .Times() clause.
+void ExpectationBase::SpecifyCardinality(const Cardinality& cardinality) {
+  cardinality_specified_ = true;
+  cardinality_ = cardinality;
+}
+
+// Retires all pre-requisites of this expectation.
+void ExpectationBase::RetireAllPreRequisites() {
+  if (is_retired()) {
+    // We can take this short-cut as we never retire an expectation
+    // until we have retired all its pre-requisites.
+    return;
+  }
+
+  for (ExpectationBaseSet::const_iterator it =
+           immediate_prerequisites_.begin();
+       it != immediate_prerequisites_.end();
+       ++it) {
+    ExpectationBase* const prerequisite = (*it).get();
+    if (!prerequisite->is_retired()) {
+      prerequisite->RetireAllPreRequisites();
+      prerequisite->Retire();
+    }
+  }
+}
+
+// Returns true iff all pre-requisites of this expectation have been
+// satisfied.
+// L >= g_gmock_mutex
+bool ExpectationBase::AllPrerequisitesAreSatisfied() const {
+  g_gmock_mutex.AssertHeld();
+  for (ExpectationBaseSet::const_iterator it = immediate_prerequisites_.begin();
+       it != immediate_prerequisites_.end(); ++it) {
+    if (!(*it)->IsSatisfied() ||
+        !(*it)->AllPrerequisitesAreSatisfied())
+      return false;
+  }
+  return true;
+}
+
+// Adds unsatisfied pre-requisites of this expectation to 'result'.
+// L >= g_gmock_mutex
+void ExpectationBase::FindUnsatisfiedPrerequisites(
+    ExpectationBaseSet* result) const {
+  g_gmock_mutex.AssertHeld();
+  for (ExpectationBaseSet::const_iterator it = immediate_prerequisites_.begin();
+       it != immediate_prerequisites_.end(); ++it) {
+    if ((*it)->IsSatisfied()) {
+      // If *it is satisfied and has a call count of 0, some of its
+      // pre-requisites may not be satisfied yet.
+      if ((*it)->call_count_ == 0) {
+        (*it)->FindUnsatisfiedPrerequisites(result);
+      }
+    } else {
+      // Now that we know *it is unsatisfied, we are not so interested
+      // in whether its pre-requisites are satisfied.  Therefore we
+      // don't recursively call FindUnsatisfiedPrerequisites() here.
+      result->insert(*it);
+    }
+  }
+}
+
+// Points to the implicit sequence introduced by a living InSequence
+// object (if any) in the current thread or NULL.
+ThreadLocal<Sequence*> g_gmock_implicit_sequence;
+
+// Reports an uninteresting call (whose description is in msg) in the
+// manner specified by 'reaction'.
+void ReportUninterestingCall(CallReaction reaction, const string& msg) {
+  switch (reaction) {
+    case ALLOW:
+      Log(INFO, msg, 4);
+      break;
+    case WARN:
+      Log(WARNING, msg, 4);
+      break;
+    default:  // FAIL
+      Expect(false, NULL, -1, msg);
+  }
+}
+
+}  // namespace internal
+
+// Class Mock.
+
+namespace {
+
+typedef std::set<internal::UntypedFunctionMockerBase*> FunctionMockers;
+
+// The current state of a mock object.  Such information is needed for
+// detecting leaked mock objects and explicitly verifying a mock's
+// expectations.
+struct MockObjectState {
+  MockObjectState()
+      : first_used_file(NULL), first_used_line(-1), leakable(false) {}
+
+  // Where in the source file an ON_CALL or EXPECT_CALL is first
+  // invoked on this mock object.
+  const char* first_used_file;
+  int first_used_line;
+  ::std::string first_used_test_case;
+  ::std::string first_used_test;
+  bool leakable;  // true iff it's OK to leak the object.
+  FunctionMockers function_mockers;  // All registered methods of the object.
+};
+
+// A global registry holding the state of all mock objects that are
+// alive.  A mock object is added to this registry the first time
+// Mock::AllowLeak(), ON_CALL(), or EXPECT_CALL() is called on it.  It
+// is removed from the registry in the mock object's destructor.
+class MockObjectRegistry {
+ public:
+  // Maps a mock object (identified by its address) to its state.
+  typedef std::map<const void*, MockObjectState> StateMap;
+
+  // This destructor will be called when a program exits, after all
+  // tests in it have been run.  By then, there should be no mock
+  // object alive.  Therefore we report any living object as test
+  // failure, unless the user explicitly asked us to ignore it.
+  ~MockObjectRegistry() {
+    using ::std::cout;
+
+    if (!GMOCK_FLAG(catch_leaked_mocks))
+      return;
+
+    int leaked_count = 0;
+    for (StateMap::const_iterator it = states_.begin(); it != states_.end();
+         ++it) {
+      if (it->second.leakable)  // The user said it's fine to leak this object.
+        continue;
+
+      // TODO(wan@google.com): Print the type of the leaked object.
+      // This can help the user identify the leaked object.
+      cout << "\n";
+      const MockObjectState& state = it->second;
+      internal::FormatFileLocation(
+          state.first_used_file, state.first_used_line, &cout);
+      cout << " ERROR: this mock object";
+      if (state.first_used_test != "") {
+        cout << " (used in test " << state.first_used_test_case << "."
+             << state.first_used_test << ")";
+      }
+      cout << " should be deleted but never is. Its address is @"
+           << it->first << ".";
+      leaked_count++;
+    }
+    if (leaked_count > 0) {
+      cout << "\nERROR: " << leaked_count
+           << " leaked mock " << (leaked_count == 1 ? "object" : "objects")
+           << " found at program exit.\n";
+      cout.flush();
+      ::std::cerr.flush();
+      // RUN_ALL_TESTS() has already returned when this destructor is
+      // called.  Therefore we cannot use the normal Google Test
+      // failure reporting mechanism.
+      _exit(1);  // We cannot call exit() as it is not reentrant and
+                 // may already have been called.
+    }
+  }
+
+  StateMap& states() { return states_; }
+ private:
+  StateMap states_;
+};
+
+// Protected by g_gmock_mutex.
+MockObjectRegistry g_mock_object_registry;
+
+// Maps a mock object to the reaction Google Mock should have when an
+// uninteresting method is called.  Protected by g_gmock_mutex.
+std::map<const void*, internal::CallReaction> g_uninteresting_call_reaction;
+
+// Sets the reaction Google Mock should have when an uninteresting
+// method of the given mock object is called.
+// L < g_gmock_mutex
+void SetReactionOnUninterestingCalls(const void* mock_obj,
+                                     internal::CallReaction reaction) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_uninteresting_call_reaction[mock_obj] = reaction;
+}
+
+}  // namespace
+
+// Tells Google Mock to allow uninteresting calls on the given mock
+// object.
+// L < g_gmock_mutex
+void Mock::AllowUninterestingCalls(const void* mock_obj) {
+  SetReactionOnUninterestingCalls(mock_obj, internal::ALLOW);
+}
+
+// Tells Google Mock to warn the user about uninteresting calls on the
+// given mock object.
+// L < g_gmock_mutex
+void Mock::WarnUninterestingCalls(const void* mock_obj) {
+  SetReactionOnUninterestingCalls(mock_obj, internal::WARN);
+}
+
+// Tells Google Mock to fail uninteresting calls on the given mock
+// object.
+// L < g_gmock_mutex
+void Mock::FailUninterestingCalls(const void* mock_obj) {
+  SetReactionOnUninterestingCalls(mock_obj, internal::FAIL);
+}
+
+// Tells Google Mock the given mock object is being destroyed and its
+// entry in the call-reaction table should be removed.
+// L < g_gmock_mutex
+void Mock::UnregisterCallReaction(const void* mock_obj) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_uninteresting_call_reaction.erase(mock_obj);
+}
+
+// Returns the reaction Google Mock will have on uninteresting calls
+// made on the given mock object.
+// L < g_gmock_mutex
+internal::CallReaction Mock::GetReactionOnUninterestingCalls(
+    const void* mock_obj) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  return (g_uninteresting_call_reaction.count(mock_obj) == 0) ?
+      internal::WARN : g_uninteresting_call_reaction[mock_obj];
+}
+
+// Tells Google Mock to ignore mock_obj when checking for leaked mock
+// objects.
+// L < g_gmock_mutex
+void Mock::AllowLeak(const void* mock_obj) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_mock_object_registry.states()[mock_obj].leakable = true;
+}
+
+// Verifies and clears all expectations on the given mock object.  If
+// the expectations aren't satisfied, generates one or more Google
+// Test non-fatal failures and returns false.
+// L < g_gmock_mutex
+bool Mock::VerifyAndClearExpectations(void* mock_obj) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  return VerifyAndClearExpectationsLocked(mock_obj);
+}
+
+// Verifies all expectations on the given mock object and clears its
+// default actions and expectations.  Returns true iff the
+// verification was successful.
+// L < g_gmock_mutex
+bool Mock::VerifyAndClear(void* mock_obj) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  ClearDefaultActionsLocked(mock_obj);
+  return VerifyAndClearExpectationsLocked(mock_obj);
+}
+
+// Verifies and clears all expectations on the given mock object.  If
+// the expectations aren't satisfied, generates one or more Google
+// Test non-fatal failures and returns false.
+// L >= g_gmock_mutex
+bool Mock::VerifyAndClearExpectationsLocked(void* mock_obj) {
+  internal::g_gmock_mutex.AssertHeld();
+  if (g_mock_object_registry.states().count(mock_obj) == 0) {
+    // No EXPECT_CALL() was set on the given mock object.
+    return true;
+  }
+
+  // Verifies and clears the expectations on each mock method in the
+  // given mock object.
+  bool expectations_met = true;
+  FunctionMockers& mockers =
+      g_mock_object_registry.states()[mock_obj].function_mockers;
+  for (FunctionMockers::const_iterator it = mockers.begin();
+       it != mockers.end(); ++it) {
+    if (!(*it)->VerifyAndClearExpectationsLocked()) {
+      expectations_met = false;
+    }
+  }
+
+  // We don't clear the content of mockers, as they may still be
+  // needed by ClearDefaultActionsLocked().
+  return expectations_met;
+}
+
+// Registers a mock object and a mock method it owns.
+// L < g_gmock_mutex
+void Mock::Register(const void* mock_obj,
+                    internal::UntypedFunctionMockerBase* mocker) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_mock_object_registry.states()[mock_obj].function_mockers.insert(mocker);
+}
+
+// Tells Google Mock where in the source code mock_obj is used in an
+// ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
+// information helps the user identify which object it is.
+// L < g_gmock_mutex
+void Mock::RegisterUseByOnCallOrExpectCall(
+    const void* mock_obj, const char* file, int line) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  MockObjectState& state = g_mock_object_registry.states()[mock_obj];
+  if (state.first_used_file == NULL) {
+    state.first_used_file = file;
+    state.first_used_line = line;
+    const TestInfo* const test_info =
+        UnitTest::GetInstance()->current_test_info();
+    if (test_info != NULL) {
+      // TODO(wan@google.com): record the test case name when the
+      // ON_CALL or EXPECT_CALL is invoked from SetUpTestCase() or
+      // TearDownTestCase().
+      state.first_used_test_case = test_info->test_case_name();
+      state.first_used_test = test_info->name();
+    }
+  }
+}
+
+// Unregisters a mock method; removes the owning mock object from the
+// registry when the last mock method associated with it has been
+// unregistered.  This is called only in the destructor of
+// FunctionMockerBase.
+// L >= g_gmock_mutex
+void Mock::UnregisterLocked(internal::UntypedFunctionMockerBase* mocker) {
+  internal::g_gmock_mutex.AssertHeld();
+  for (MockObjectRegistry::StateMap::iterator it =
+           g_mock_object_registry.states().begin();
+       it != g_mock_object_registry.states().end(); ++it) {
+    FunctionMockers& mockers = it->second.function_mockers;
+    if (mockers.erase(mocker) > 0) {
+      // mocker was in mockers and has been just removed.
+      if (mockers.empty()) {
+        g_mock_object_registry.states().erase(it);
+      }
+      return;
+    }
+  }
+}
+
+// Clears all ON_CALL()s set on the given mock object.
+// L >= g_gmock_mutex
+void Mock::ClearDefaultActionsLocked(void* mock_obj) {
+  internal::g_gmock_mutex.AssertHeld();
+
+  if (g_mock_object_registry.states().count(mock_obj) == 0) {
+    // No ON_CALL() was set on the given mock object.
+    return;
+  }
+
+  // Clears the default actions for each mock method in the given mock
+  // object.
+  FunctionMockers& mockers =
+      g_mock_object_registry.states()[mock_obj].function_mockers;
+  for (FunctionMockers::const_iterator it = mockers.begin();
+       it != mockers.end(); ++it) {
+    (*it)->ClearDefaultActionsLocked();
+  }
+
+  // We don't clear the content of mockers, as they may still be
+  // needed by VerifyAndClearExpectationsLocked().
+}
+
+// Adds an expectation to a sequence.
+void Sequence::AddExpectation(
+    const internal::linked_ptr<internal::ExpectationBase>& expectation) const {
+  if (*last_expectation_ != expectation) {
+    if (*last_expectation_ != NULL) {
+      expectation->immediate_prerequisites_.insert(*last_expectation_);
+    }
+    *last_expectation_ = expectation;
+  }
+}
+
+// Creates the implicit sequence if there isn't one.
+InSequence::InSequence() {
+  if (internal::g_gmock_implicit_sequence.get() == NULL) {
+    internal::g_gmock_implicit_sequence.set(new Sequence);
+    sequence_created_ = true;
+  } else {
+    sequence_created_ = false;
+  }
+}
+
+// Deletes the implicit sequence if it was created by the constructor
+// of this object.
+InSequence::~InSequence() {
+  if (sequence_created_) {
+    delete internal::g_gmock_implicit_sequence.get();
+    internal::g_gmock_implicit_sequence.set(NULL);
+  }
+}
+
+}  // namespace testing