Bindings and client interface for the IsAppInstalled API.

third_party/WebKit/public/web/WebFrameClient.h

Index: third_party/WebKit/public/web/WebFrameClient.h
diff --git a/third_party/WebKit/public/web/WebFrameClient.h b/third_party/WebKit/public/web/WebFrameClient.h
index e0578dc5fb4b828bc759731c50267e2ef041a896..0493b746bc2c5ac380cc2b736505ab4604d1fa06 100644
--- a/third_party/WebKit/public/web/WebFrameClient.h
+++ b/third_party/WebKit/public/web/WebFrameClient.h
@@ -75,6 +75,7 @@ class WebExternalPopupMenu;
 class WebExternalPopupMenuClient;
 class WebFormElement;
 class WebGeolocationClient;
+class WebInstalledAppClient;
 class WebMediaPlayerClient;
 class WebMediaPlayerEncryptedMediaClient;
 class WebMediaSession;
@@ -356,6 +357,10 @@ public:
     // Used to access the embedder for the Presentation API.
     virtual WebPresentationClient* presentationClient() { return 0; }
 
+    // InstalledApp API ----------------------------------------------------
+
+    // Used to access the embedder for the InstalledApp API.
+    virtual WebInstalledAppClient* installedAppClient() { return nullptr; }
 
     // Editing -------------------------------------------------------------