mojo/public: Include gtest.h as "gtest/gtest.h", instead of via "absolute" path.

mojo/public/cpp/bindings/tests/bindings_perftest.cc

 // Copyright 2015 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 "gtest/gtest.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/test_support/test_support.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/ping_service.mojom.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace {
 
 const double kMojoTicksPerSecond = 1000000.0;
 
 double MojoTicksToSeconds(MojoTimeTicks ticks) {
   return ticks / kMojoTicksPerSecond;
 }
 
@@ skipping 96 matching lines @@
         "InProcessPingPong", "1000_Inactive",
         kIterations / MojoTicksToSeconds(end_time - start_time),
         "pings/second");
 
     delete[] inactive_services;
   }
 }
 
 }  // namespace
 }  // namespace mojo