[WIP] Implement Notifications through Platform instead of WebFrame.

public/platform/Platform.h

Index: public/platform/Platform.h
diff --git a/public/platform/Platform.h b/public/platform/Platform.h
index 99eb1083ad90e4e3ed41b33f7d8a9e2f01cd3630..e73432d49ad5bcb2eadec1c82dcdcfa25d839f4f 100644
--- a/public/platform/Platform.h
+++ b/public/platform/Platform.h
@@ -85,7 +85,7 @@ class WebMediaStreamCenter;
 class WebMediaStreamCenterClient;
 class WebMessagePortChannel;
 class WebMimeRegistry;
-class WebNotificationPresenter;
+class WebNotificationManager;
 class WebPluginListBuilder;
 class WebPrescientNetworking;
 class WebPublicSuffixList;
@@ -629,7 +629,7 @@ public:
 
     // Web Notifications --------------------------------------------------
 
-    virtual WebNotificationPresenter* notificationPresenter() { return 0; }
+    virtual WebNotificationManager* notificationManager() { return 0; }
 
 
     // Geofencing ---------------------------------------------------------