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

mojo/public/cpp/bindings/tests/iterator_test_util.h

 // 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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_TESTS_ITERATOR_TEST_UTIL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_TESTS_ITERATOR_TEST_UTIL_H_
 
 #include <algorithm>
 #include <vector>
 
-#include "testing/gtest/include/gtest/gtest.h"
+#include "gtest/gtest.h"
 
 namespace mojo {
 namespace test {
 
 template <typename Iterator, typename ValueType>
 void ExpectIteratorValues(Iterator begin,
                           Iterator end,
                           const std::vector<ValueType>& expected_values) {
   size_t i = 0u;
   for (Iterator it = begin; it != end; ++it, ++i) {
@@ skipping 101 matching lines @@
     *--it = 22;
     values[0] = 22;
     ExpectIteratorValues(begin, end, values);
   }
 }
 
 }  // namespace test
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_TESTS_ITERATOR_TEST_UTIL_H_