Refactor m_absoluteTransform out of SVGFilter and into base class.

Source/core/rendering/FilterEffectRenderer.cpp

Index: Source/core/rendering/FilterEffectRenderer.cpp
diff --git a/Source/core/rendering/FilterEffectRenderer.cpp b/Source/core/rendering/FilterEffectRenderer.cpp
index 1a818941335465d562ab8474df12d5d81c7e0816..992fb55066cabc2d9d8110e42375c9fe7a393c18 100644
--- a/Source/core/rendering/FilterEffectRenderer.cpp
+++ b/Source/core/rendering/FilterEffectRenderer.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
+ * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -96,7 +97,8 @@ static PassRefPtr<FECustomFilter> createCustomFilterEffect(Filter* filter, Docum
 }
 
 FilterEffectRenderer::FilterEffectRenderer()
-    : m_graphicsBufferAttached(false)
+    : Filter(AffineTransform())
+    , m_graphicsBufferAttached(false)
     , m_hasFilterThatMovesPixels(false)
     , m_hasCustomShaderFilter(false)
 {