Inform the WebFrameClient of BeforeUnload/Unload handlers

Source/core/loader/FrameLoaderClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 209 matching lines @@
 
         virtual PassOwnPtr<blink::WebApplicationCacheHost> createApplicationCacheHost(blink::WebApplicationCacheHostClient*) = 0;
 
         virtual void didStopAllLoaders() { }
 
         virtual void dispatchDidChangeManifest() { }
 
         virtual unsigned backForwardLength() { return 0; }
 
         virtual bool isFrameLoaderClientImpl() const { return false; }
+
+        // Called when an element preventing the sudden termination of the frame
+        // is added or removed. |variation| is the number of elements added, or
+        // removed if it is negative. |type| is the type of element
+        // (BeforeUnload handler, Unload handler).
+        enum SuddenTerminationDisablerType {

[Nate Chapin, 2015/01/20 18:46:49]

This enum and the matching one in WebFrameClient.h should be added to
Source/web/AssertMatchingEnums.cpp

[clamy, 2015/01/21 13:46:31]

Done.

+            BeforeUnloadHandler,
+            UnloadHandler,
+        };
+        virtual void suddenTerminationDisablerChanged(int variation, SuddenTerminationDisablerType) { }
+
     };
 
 } // namespace blink
 
 #endif // FrameLoaderClient_h