Get rid of scheduleSVGFilterLayerUpdateHack call for plugins.

Source/core/rendering/style/StyleRareNonInheritedData.h

Index: Source/core/rendering/style/StyleRareNonInheritedData.h
diff --git a/Source/core/rendering/style/StyleRareNonInheritedData.h b/Source/core/rendering/style/StyleRareNonInheritedData.h
index 5590030fc1f00c593ef8cf5fa05cededd1655c40..8a724ac79466937e8d199b5633b797f82469b356 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.h
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.h
@@ -198,6 +198,12 @@ public:
     // value (that can only be specified using CSSOM scroll APIs) so 2 bits are needed.
     unsigned m_scrollBehavior: 2;
 
+    // Plugins require accelerated compositing for reasons external to blink.
+    // In which case, we need to update the RenderStyle on the RenderEmbeddedObject,
+    // so store this bit so that the style actually changes when the plugin
+    // becomes composited.
+    unsigned m_requiresAcceleratedCompositingForExternalReasons: 1;
+
 private:
     StyleRareNonInheritedData();
     StyleRareNonInheritedData(const StyleRareNonInheritedData&);