[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_binding_test_util.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.
 
-#include "extensions/renderer/api_binding_test_util.h"
+#include "extensions/renderer/bindings/api_binding_test_util.h"
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 #include "content/public/child/v8_value_converter.h"
 #include "gin/converter.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
@@ skipping 183 matching lines @@
   return V8ToBaseValue(GetPropertyFromObject(object, context, key), context);
 }
 
 std::string GetStringPropertyFromObject(v8::Local<v8::Object> object,
                                         v8::Local<v8::Context> context,
                                         base::StringPiece key) {
   return V8ToString(GetPropertyFromObject(object, context, key), context);
 }
 
 }  // namespace extensions