Merge 144236

Source/WebCore/platform/Widget.h

Index: Source/WebCore/platform/Widget.h
===================================================================
--- Source/WebCore/platform/Widget.h	(revision 145274)
+++ Source/WebCore/platform/Widget.h	(working copy)
@@ -206,6 +206,9 @@
     // Notifies this widget that other widgets on the page have been repositioned.
     virtual void widgetPositionsUpdated() {}
 
+    // Notifies this widget that its clip rect changed.
+    virtual void clipRectChanged() { }
+
     // Whether transforms affect the frame rect. FIXME: We get rid of this and have
     // the frame rects be the same no matter what transforms are applied.
     virtual bool transformsAffectFrameRect() { return true; }