Plumb changes to the focused frame to WebFramelient.

public/web/WebFrameClient.h

Index: public/web/WebFrameClient.h
diff --git a/public/web/WebFrameClient.h b/public/web/WebFrameClient.h
index b0b23e7552839ca0600b555078863a030bd29cd6..39b14c9bb3cc55bd8b5be729f8303c04b84dc509 100644
--- a/public/web/WebFrameClient.h
+++ b/public/web/WebFrameClient.h
@@ -130,6 +130,9 @@ public:
     // This frame has been detached from the view, but has not been closed yet.
     virtual void frameDetached(WebFrame*) { }
 
+    // This frame has become focused..
+    virtual void frameFocused() { }
+
     // This frame is about to be closed. This is called after frameDetached,
     // when the document is being unloaded, due to new one committing.
     virtual void willClose(WebFrame*) { }