Update gtest to 786564fa4a3c, switch to googlemock in gtest

base/hash_unittest.cc

 // Copyright 2014 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/hash.h"
 
 #include <string>
 #include <vector>
 
-#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest/googletest/include/gtest/gtest.h"
 
 namespace base {
 
 TEST(HashTest, String) {
   std::string str;
   // Empty string (should hash to 0).
   str = "";
   EXPECT_EQ(0u, Hash(str));
 
   // Simple test.
@@ skipping 52 matching lines @@
   str = "hello world";
   EXPECT_EQ(2794219650u, Hash(str, strlen(str)));
 
   // Ensure that it stops reading after the given length, and does not expect a
   // null byte.
   str = "hello world; don't read this part";
   EXPECT_EQ(2794219650u, Hash(str, strlen("hello world")));
 }
 
 }  // namespace base