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

mojo/public/c/tests/bindings/testing_util.h

 // 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.
 
 #ifndef MOJO_PUBLIC_C_TESTS_BINDINGS_TESTING_UTIL_H_
 #define MOJO_PUBLIC_C_TESTS_BINDINGS_TESTING_UTIL_H_
 
 #include <mojo/bindings/buffer.h>
 #include <mojo/system/handle.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 
-#include "testing/gtest/include/gtest/gtest.h"
+#include "gtest/gtest.h"
 
 // This will copy the supplied |in_struct| and compare it against the new
 // copy, expecting them to be the same. It compares the encoded version to be
 // sure that they are the same, since a unencoded version will have pointers
 // pointing to separate objects in the two copies, whereas encoded versions will
 // only have relative offsets for pointers. The new copy will remain encoded,
 // and the original will be decoded.
 // This function won't work for structs with handles, and will crash.
 template <typename T>
 void CopyAndCompare(
@@ skipping 13 matching lines @@
   EXPECT_EQ(in_struct_size, buf->num_bytes_used);
 
   encode_fn(in_struct, in_struct_size, NULL);
   encode_fn(out_struct, buf->num_bytes_used, NULL);
   EXPECT_EQ(0, memcmp(in_struct, out_struct, buf->num_bytes_used));
 
   decode_fn(in_struct, in_struct_size, NULL, 0);
 }
 
 #endif  // MOJO_PUBLIC_C_TESTS_BINDINGS_TESTING_UTIL_H_