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

mojo/public/cpp/environment/tests/async_wait_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 <mojo/environment/async_waiter.h>
 #include <mojo/result.h>
 #include <mojo/system/time.h>
 
 #include <string>
 
+#include "gtest/gtest.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/system/handle.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/cpp/system/message_pipe.h"
 #include "mojo/public/cpp/test_support/test_utils.h"
 #include "mojo/public/cpp/utility/run_loop.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace {
 
 class TestAsyncWaitCallback {
  public:
   TestAsyncWaitCallback() : result_count_(0), last_result_(MOJO_RESULT_OK) {}
   ~TestAsyncWaitCallback() {}
 
   int result_count() const { return result_count_; }
@@ skipping 80 matching lines @@
   EXPECT_TRUE(test::WriteTextMessage(test_pipe.handle1.get(), std::string()));
 
   CallCancelWait(CallAsyncWait(
       test_pipe.handle0.get(), MOJO_HANDLE_SIGNAL_READABLE, &callback));
   RunLoop::current()->Run();
   EXPECT_EQ(0, callback.result_count());
 }
 
 }  // namespace
 }  // namespace mojo