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

chrome/renderer/extensions/app_bindings.h

Index: chrome/renderer/extensions/app_bindings.h
diff --git a/chrome/renderer/extensions/app_bindings.h b/chrome/renderer/extensions/app_bindings.h
index e27c770f3c6f0499303b94e4e3b2f6bac2ed7d3d..2bab2a68b415a0947e18880748580a1d039dcad7 100644
--- a/chrome/renderer/extensions/app_bindings.h
+++ b/chrome/renderer/extensions/app_bindings.h
@@ -35,12 +35,15 @@ class AppBindings : public ChromeV8Extension, public ChromeV8ExtensionHandler {
   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);
 };