Implement "appinstalled" event on Android.

third_party/WebKit/public/web/WebLocalFrame.h

 // Copyright 2014 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 WebLocalFrame_h
 #define WebLocalFrame_h
 
 #include "WebCompositionUnderline.h"
 #include "WebFrame.h"
 #include "WebFrameLoadType.h"
@@ skipping 295 matching lines @@
   // App banner -------------------------------------------------------------
 
   // Request to show an application install banner for the given |platforms|.
   // The implementation can request the embedder to cancel the call by setting
   // |cancel| to true.
   virtual void willShowInstallBannerPrompt(
       int requestId,
       const WebVector<WebString>& platforms,
       WebAppBannerPromptReply*) = 0;
 
+  // Notifies that the web application has been installed.
+  virtual void onAppInstalled() = 0;
+
   // Image reload -----------------------------------------------------------
 
   // If the provided node is an image, reload the image disabling Lo-Fi.
   virtual void reloadImage(const WebNode&) = 0;
 
   // Reloads all the Lo-Fi images in this WebLocalFrame. Ignores the cache and
   // reloads from the network.
   virtual void reloadLoFiImages() = 0;
 
   // Feature usage logging --------------------------------------------------
@@ skipping 123 matching lines @@
   // to call these on a WebLocalFrame.
   bool isWebLocalFrame() const override = 0;
   WebLocalFrame* toWebLocalFrame() override = 0;
   bool isWebRemoteFrame() const override = 0;
   WebRemoteFrame* toWebRemoteFrame() override = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebLocalFrame_h