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

mojo/public/c/tests/bindings/validation_unittest.cc

 // Copyright 2016 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.
 
 // TODO(vardhan): There is some duplicate code here borrowed from
 // mojo/public/cpp/bindings/tests/validation_unittest.cc; extract it into a
 // library, and share?
 
 #include <mojo/bindings/internal/util.h>
 #include <mojo/bindings/message.h>
 #include <mojo/bindings/struct.h>
 #include <stdio.h>
 
 #include <functional>
 #include <string>
 
+#include "gtest/gtest.h"
 #include "mojo/public/cpp/bindings/tests/validation_util.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/cpp/test_support/test_support.h"
 #include "mojo/public/interfaces/bindings/tests/validation_test_interfaces.mojom-c.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 using mojo::test::EnumerateSourceRootRelativeDirectory;
 
 namespace mojo {
 namespace test {
 namespace {
 
 const char* MojomValidationResultToString(MojomValidationResult error) {
   switch (error) {
     case MOJOM_VALIDATION_ERROR_NONE:
@@ skipping 229 matching lines @@
 TEST(ValidationTest, ResponseBoundsCheck) {
   RunValidationTests("resp_boundscheck_",
                      DispatchBoundsCheckTestInterface_Response_Validate);
 }
 
 // TODO(vardhan): Tests for "integration_" files.
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo