Carry out a resize even if no layout has been performed.

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 70c928cd03dc8e2dc87d4bf4b4d0d2868f67edc9..8129eaf26d9842a136b617dc12de175c9831f978 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -132,6 +132,8 @@ public:
 
     bool isEnclosedInCompositingLayer() const;
 
+    void didChangeForceLayoutHeightMode();

[aelias_OOO_until_Jul13, 2015/02/12 19:49:17]

Please rename this to didChangeViewportDescriptionSettings since it ended up
tied to the more generic setting.

[gsennton, 2015/02/13 19:11:15]

This is no longer tied to the more general setting (since that produced a lot of
flakiness) and the name is therefore unchanged.

+
     void resetScrollbars();
     void prepareForDetach();
     void detachCustomScrollbars();