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

mojo/public/cpp/bindings/tests/bounds_checker_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 <limits>
 
+#include "gtest/gtest.h"
 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
 #include "mojo/public/cpp/bindings/lib/bounds_checker.h"
 #include "mojo/public/cpp/system/handle.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace test {
 namespace {
 
 const void* ToPtr(uintptr_t ptr) {
   return reinterpret_cast<const void*>(ptr);
 }
 
 #if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
@@ skipping 179 matching lines @@
 
     // This should be fine.
     EXPECT_TRUE(checker.ClaimMemory(
         ToPtr(std::numeric_limits<uintptr_t>::max() - 750), 200));
   }
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo