Move extensions bindings code out of //chrome

chrome/renderer/extensions/api_definitions_natives.h

-// Copyright (c) 2012 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 CHROME_RENDERER_EXTENSIONS_API_DEFINITIONS_NATIVES_H_
-#define CHROME_RENDERER_EXTENSIONS_API_DEFINITIONS_NATIVES_H_
-
-#include "chrome/renderer/extensions/chrome_v8_extension.h"
-#include "chrome/renderer/extensions/dispatcher.h"
-
-#include "v8/include/v8.h"
-
-class ChromeV8Context;
-
-namespace extensions {
-
-// Native functions for JS to get access to the schemas for extension APIs.
-class ApiDefinitionsNatives : public ChromeV8Extension {
- public:
-  ApiDefinitionsNatives(Dispatcher* dispatcher, ChromeV8Context* context);
-
- private:
-  // Returns the list of all schemas that are available to the calling context.
-  void GetExtensionAPIDefinitionsForTest(
-      const v8::FunctionCallbackInfo<v8::Value>& args);
-  DISALLOW_COPY_AND_ASSIGN(ApiDefinitionsNatives);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_RENDERER_EXTENSIONS_API_DEFINITIONS_NATIVES_H_