Increase width of viewportConstrainedNotCompositingReasons

Source/core/rendering/RenderLayer.h

Index: Source/core/rendering/RenderLayer.h
diff --git a/Source/core/rendering/RenderLayer.h b/Source/core/rendering/RenderLayer.h
index b0e5ffbd6c6cbd34717db55785cace48550097dc..f608430adec6436ab5e71ff3fe26cfc120281242 100644
--- a/Source/core/rendering/RenderLayer.h
+++ b/Source/core/rendering/RenderLayer.h
@@ -431,7 +431,12 @@ public:
         NotCompositedForUnscrollableAncestors,
     };
 
-    void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotCompositedReason reason) { m_compositingProperties.viewportConstrainedNotCompositedReason = reason; }
+    void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotCompositedReason reason)
+    {
+        m_compositingProperties.viewportConstrainedNotCompositedReason = reason;
+        ASSERT(viewportConstrainedNotCompositedReason() == reason);

[enne (OOO), 2014/02/28 20:47:07]

Not sure this makes any sense either anymore.

+    }
+
     ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReason() const { return static_cast<ViewportConstrainedNotCompositedReason>(m_compositingProperties.viewportConstrainedNotCompositedReason); }
 
     bool isOutOfFlowRenderFlowThread() const { return renderer()->isOutOfFlowRenderFlowThread(); }
@@ -731,7 +736,7 @@ protected:
         bool lostGroupedMapping : 1;
 
         // The reason, if any exists, that a fixed-position layer is chosen not to be composited.
-        unsigned viewportConstrainedNotCompositedReason : 2;
+        ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReason;
 
         // Once computed, indicates all that a layer needs to become composited using the CompositingReasons enum bitfield.
         CompositingReasons compositingReasons;