hasDescendantWithBlendMode should not be propagated outside the current stacking context.

Source/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 427 matching lines @@
         // we won't need to use the "unclipped" concept for promotion any
         // longer.
         unsigned isUnclippedDescendant : 1;
         unsigned hasAncestorWithClipPath : 1;
     };
 
     class DescendantDependentCompositingInputs {
     public:
         DescendantDependentCompositingInputs()
             : hasDescendantWithClipPath(false)
-            , hasDescendantWithBlendMode(false)
+            , hasNonIsolatedDescendantWithBlendMode(false)
         { }
 
         unsigned hasDescendantWithClipPath : 1;
-        unsigned hasDescendantWithBlendMode : 1;
+        unsigned hasNonIsolatedDescendantWithBlendMode : 1;
     };
 
     void setNeedsCompositingInputsUpdate();
     bool childNeedsCompositingInputsUpdate() const { return m_childNeedsCompositingInputsUpdate; }
     bool needsCompositingInputsUpdate() const
     {
         // While we're updating the compositing inputs, these values may differ.
         // We should never be asking for this value when that is the case.
         ASSERT(m_needsDescendantDependentCompositingInputsUpdate == m_needsAncestorDependentCompositingInputsUpdate);
         return m_needsDescendantDependentCompositingInputsUpdate;
@@ skipping 10 matching lines @@
     const RenderLayer* opacityAncestor() const { return ancestorDependentCompositingInputs().opacityAncestor; }
     const RenderLayer* transformAncestor() const { return ancestorDependentCompositingInputs().transformAncestor; }
     const RenderLayer* filterAncestor() const { return ancestorDependentCompositingInputs().filterAncestor; }
     const RenderObject* clippingContainer() const { return ancestorDependentCompositingInputs().clippingContainer; }
     const RenderLayer* ancestorScrollingLayer() const { return ancestorDependentCompositingInputs().ancestorScrollingLayer; }
     RenderLayer* scrollParent() const { return const_cast<RenderLayer*>(ancestorDependentCompositingInputs().scrollParent); }
     RenderLayer* clipParent() const { return const_cast<RenderLayer*>(ancestorDependentCompositingInputs().clipParent); }
     bool isUnclippedDescendant() const { return ancestorDependentCompositingInputs().isUnclippedDescendant; }
     bool hasAncestorWithClipPath() const { return ancestorDependentCompositingInputs().hasAncestorWithClipPath; }
     bool hasDescendantWithClipPath() const { return descendantDependentCompositingInputs().hasDescendantWithClipPath; }
-    bool hasDescendantWithBlendMode() const { return descendantDependentCompositingInputs().hasDescendantWithBlendMode; }
+    bool hasNonIsolatedDescendantWithBlendMode() const { return descendantDependentCompositingInputs().hasNonIsolatedDescendantWithBlendMode; }
 
     bool lostGroupedMapping() const { ASSERT(isAllowedToQueryCompositingState()); return m_lostGroupedMapping; }
     void setLostGroupedMapping(bool b) { m_lostGroupedMapping = b; }
 
     CompositingReasons compositingReasons() const { ASSERT(isAllowedToQueryCompositingState()); return m_compositingReasons; }
     void setCompositingReasons(CompositingReasons, CompositingReasons mask = CompositingReasonAll);
 
     bool hasCompositingDescendant() const { ASSERT(isAllowedToQueryCompositingState()); return m_hasCompositingDescendant; }
     void setHasCompositingDescendant(bool);
 
@@ skipping 215 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::RenderLayer*);
 void showLayerTree(const blink::RenderObject*);
 #endif
 
 #endif // RenderLayer_h