Update gtest to 786564fa4a3c, switch to googlemock in gtest

base/metrics/sample_map_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/metrics/sample_map.h"
 
 #include "base/memory/scoped_ptr.h"
-#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest/googletest/include/gtest/gtest.h"
 
 namespace base {
 namespace {
 
 TEST(SampleMapTest, AccumulateTest) {
   SampleMap samples;
 
   samples.Accumulate(1, 100);
   samples.Accumulate(2, 200);
   samples.Accumulate(1, -200);
@@ skipping 129 matching lines @@
   samples.Accumulate(1, 100);
   it = samples.Iterator();
   EXPECT_FALSE(it->Done());
 }
 
 #endif
 // (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) && GTEST_HAS_DEATH_TEST
 
 }  // namespace
 }  // namespace base