Remove ChromeV8Extension & most of ChromeV8Context

chrome/renderer/extensions/file_browser_handler_custom_bindings.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_FILE_BROWSER_HANDLER_CUSTOM_BINDINGS_H_
 #define CHROME_RENDERER_EXTENSIONS_FILE_BROWSER_HANDLER_CUSTOM_BINDINGS_H_
 
 #include "base/compiler_specific.h"
-#include "chrome/renderer/extensions/chrome_v8_extension.h"
+#include "extensions/renderer/object_backed_native_handler.h"
 
 namespace extensions {
 
 // Custom bindings for the fileBrowserHandler API.
-class FileBrowserHandlerCustomBindings : public ChromeV8Extension {
+class FileBrowserHandlerCustomBindings : public ObjectBackedNativeHandler {
  public:
-  FileBrowserHandlerCustomBindings(Dispatcher* dispatcher,
-                                   ChromeV8Context* context);
+  explicit FileBrowserHandlerCustomBindings(ScriptContext* context);
 
  private:
   void GetExternalFileEntry(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   DISALLOW_COPY_AND_ASSIGN(FileBrowserHandlerCustomBindings);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_FILE_BROWSER_HANDLER_CUSTOM_BINDINGS_H_