Navigation transitions: Added notifyTransitionsShown and setupTransitionsView to WebLocalFrame

public/web/WebLocalFrame.h

Index: public/web/WebLocalFrame.h
diff --git a/public/web/WebLocalFrame.h b/public/web/WebLocalFrame.h
index 9636eb37d699c2eb95a98c24ab5ce8f6f9d4135d..379ad4b0be713ef075fbb6af7baf35c08a0d3064 100644
--- a/public/web/WebLocalFrame.h
+++ b/public/web/WebLocalFrame.h
@@ -31,6 +31,9 @@ public:
     // Returns the frame inside a given frame or iframe element. Returns 0 if
     // the given element is not a frame, iframe or if the frame is empty.
     BLINK_EXPORT static WebLocalFrame* fromFrameOwnerElement(const WebElement&);
+
+    virtual void notifyTransitionShown(int elementsToHide) = 0;

[abarth-chromium, 2014/06/21 05:38:36]

didShowTransition ?  Is the WebLocalFrame being notified of something or being
instructed to notify someone else?  If so, who?

Why is elementsToHide represented as an int?

+    virtual void setupTransitionView(const WebData& markup) = 0;

[abarth-chromium, 2014/06/21 05:38:36]

What does it meant to setup a transition view?  Is this a request to navigate
the WebLocalFrame?  Maybe we should switch the frame into transition mode and
then kick off the navigation?  This API doesn't make much sense.

[oystein (OOO til 10th of July), 2014/07/22 21:17:21]

Done.

 };
 
 } // namespace blink