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

mojo/public/cpp/bindings/tests/binding_unittest.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.
 
 // Note: This file tests both binding.h (mojo::Binding) and strong_binding.h
 // (mojo::StrongBinding).
 
+#include "gtest/gtest.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/sample_interfaces.mojom.h"
 #include "mojo/public/interfaces/bindings/tests/sample_service.mojom.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace {
 
 class BindingTestBase : public testing::Test {
  public:
   BindingTestBase() {}
   ~BindingTestBase() override {}
 
   RunLoop& loop() { return loop_; }
@@ skipping 303 matching lines @@
 // Tests that StrongBinding::Unbind() compiles.
 TEST_F(BindingTest, StrongBindingUnbindCompile) {
   ServiceImpl impl;
   sample::ServicePtr ptr;
   StrongBinding<sample::Service> binding(&impl, GetProxy(&ptr));
   binding.Unbind();
 }
 
 }  // namespace
 }  // namespace mojo