Web Animations: Allow animations with delay to start on compositor

Source/core/rendering/RenderBoxModelObject.h

Index: Source/core/rendering/RenderBoxModelObject.h
diff --git a/Source/core/rendering/RenderBoxModelObject.h b/Source/core/rendering/RenderBoxModelObject.h
index 9eb4384f4d0e099bac3a7f274093e73c103c76ab..fb5a1c3db2ea8eb35bb268dee2eccee2de800f3c 100644
--- a/Source/core/rendering/RenderBoxModelObject.h
+++ b/Source/core/rendering/RenderBoxModelObject.h
@@ -24,6 +24,7 @@
 #ifndef RenderBoxModelObject_h
 #define RenderBoxModelObject_h
 
+#include "core/animation/ActiveAnimations.h"
 #include "core/rendering/RenderLayerModelObject.h"
 #include "core/rendering/style/ShadowData.h"
 #include "platform/geometry/LayoutRect.h"
@@ -89,7 +90,7 @@ public:
 
     virtual LayerType layerTypeRequired() const OVERRIDE
     {
-        if (isRoot() || isPositioned() || createsGroup() || hasClipPath() || hasTransform() || hasHiddenBackface() || hasReflection() || style()->specifiesColumns() || style()->hasWillChangeCompositingHint() || style()->hasWillChangeGpuRasterizationHint())
+        if (isRoot() || isPositioned() || createsGroup() || hasClipPath() || hasTransform() || hasHiddenBackface() || hasReflection() || style()->specifiesColumns() || style()->hasWillChangeCompositingHint() || style()->hasWillChangeGpuRasterizationHint() || shouldCompositeForActiveAnimations(*this))
             return NormalLayer;
 
         return NoLayer;