Update gtest to 786564fa4a3c, switch to googlemock in gtest

base/metrics/histogram_base_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 <vector>
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/pickle.h"
-#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest/googletest/include/gtest/gtest.h"
 
 namespace base {
 
 class HistogramBaseTest : public testing::Test {
  protected:
   HistogramBaseTest() {
     // Each test will have a clean state (no Histogram / BucketRanges
     // registered).
     statistics_recorder_ = NULL;
     ResetStatisticsRecorder();
@@ skipping 123 matching lines @@
 
   PickleIterator iter2(pickle);
   deserialized = DeserializeHistogramInfo(&iter2);
   EXPECT_TRUE(deserialized);
   EXPECT_NE(histogram, deserialized);
   EXPECT_EQ("TestHistogram", deserialized->histogram_name());
   EXPECT_EQ(0, deserialized->flags());
 }
 
 }  // namespace base