Add an API for hosted apps to check their install and running states.

chrome/renderer/extensions/app_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.
 
 // The AppObjectExtension is a v8 extension that creates an object
 // at window.chrome.app.  This object allows javascript to get details
 // on the app state of the page.
 // The read-only property app.isInstalled is true if the current page is
 // within the extent of an installed, enabled app.
 
@@ skipping 17 matching lines @@
 
  private:
   // IPC::Channel::Listener
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   v8::Handle<v8::Value> GetIsInstalled(const v8::Arguments& args);
   v8::Handle<v8::Value> Install(const v8::Arguments& args);
   v8::Handle<v8::Value> GetDetails(const v8::Arguments& args);
   v8::Handle<v8::Value> GetDetailsForFrame(const v8::Arguments& args);
   v8::Handle<v8::Value> GetAppNotifyChannel(const v8::Arguments& args);
+  v8::Handle<v8::Value> GetInstallState(const v8::Arguments& args);
+  v8::Handle<v8::Value> GetRunningState(const v8::Arguments& args);
 
   v8::Handle<v8::Value> GetDetailsForFrameImpl(WebKit::WebFrame* frame);
 
   void OnGetAppNotifyChannelResponse(const std::string& channel_id,
                                      const std::string& error,
                                      int callback_id);
+  void OnAppInstallStateResponse(const std::string& state, int callback_id);
 
   DISALLOW_COPY_AND_ASSIGN(AppBindings);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_APP_BINDINGS_H_