Remove deprecated chrome.pageActions api functions

chrome/renderer/extensions/page_actions_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_PAGE_ACTIONS_CUSTOM_BINDINGS_H_
-#define CHROME_RENDERER_EXTENSIONS_PAGE_ACTIONS_CUSTOM_BINDINGS_H_
-
-#include "extensions/renderer/object_backed_native_handler.h"
-
-namespace extensions {
-class Dispatcher;
-
-// Implements custom bindings for the pageActions API.
-class PageActionsCustomBindings : public ObjectBackedNativeHandler {
- public:
-  PageActionsCustomBindings(Dispatcher* dispatcher, ScriptContext* context);
-
- private:
-  void GetCurrentPageActions(const v8::FunctionCallbackInfo<v8::Value>& args);
-
-  // Dispatcher handle. Not owned.
-  Dispatcher* dispatcher_;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_RENDERER_EXTENSIONS_PAGE_ACTIONS_CUSTOM_BINDINGS_H_