Have WebFrameClient::suddenTerminationDisablerChanged return a boolean

public/web/WebFrameClient.h

Index: public/web/WebFrameClient.h
diff --git a/public/web/WebFrameClient.h b/public/web/WebFrameClient.h
index c94d0f25416bdb12f23aa5c66af5a0bb63de5267..a921c138d56778838a8ee8f7f6e576618bd5bc9d 100644
--- a/public/web/WebFrameClient.h
+++ b/public/web/WebFrameClient.h
@@ -608,15 +608,14 @@ public:
 
     // Sudden termination --------------------------------------------------
 
-    // Called when an element preventing the sudden termination of the frame is
-    // added or removed. |variation| is the number of elements added, removed if
-    // it is negative. |type| is the type of element (BeforeUnload handler,
-    // Unload handler).
+    // Called when elements preventing the sudden termination of the frame are

[Charlie Reis, 2015/01/28 20:45:02]

nit: are -> become

[clamy, 2015/01/29 12:49:11]

Done.

+    // present or stop being present. |type| is the type of element
+    // (BeforeUnload handler, Unload handler).
     enum SuddenTerminationDisablerType {
         BeforeUnloadHandler,
         UnloadHandler,
     };
-    virtual void suddenTerminationDisablerChanged(int variation, SuddenTerminationDisablerType) { }
+    virtual void suddenTerminationDisablerChanged(bool present, SuddenTerminationDisablerType) { }
 
 protected:
     virtual ~WebFrameClient() { }