Recompute slow scroll regions after overflow recalc

Source/core/page/scrolling/ScrollingCoordinator.h

Index: Source/core/page/scrolling/ScrollingCoordinator.h
diff --git a/Source/core/page/scrolling/ScrollingCoordinator.h b/Source/core/page/scrolling/ScrollingCoordinator.h
index 8631c2db88628453ba32a46f53e090c41b9d84c5..a5fd2571f55447053e7a6e03ec05a4d93885ce33 100644
--- a/Source/core/page/scrolling/ScrollingCoordinator.h
+++ b/Source/core/page/scrolling/ScrollingCoordinator.h
@@ -64,6 +64,8 @@ public:
 
     // Called when any frame has done its layout.
     void notifyLayoutUpdated();
+    // Called when any frame recalculates its overflows after style change

[Rick Byers, 2015/08/05 15:02:59]

Nit: add period to be consistent with style above
(http://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Punctuation,_...).

[majidvp, 2015/08/05 15:39:35]

Acknowledged.

+    void notifyOverflowUpdated();
 
     void updateAfterCompositingChangeIfNeeded();