Refactor m_absoluteTransform out of SVGFilter and into base class.

Source/core/rendering/FilterEffectRenderer.cpp

 /*
  * 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
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
@@ skipping 76 matching lines @@
     CustomFilterGlobalContext* globalContext = document->renderView()->customFilterGlobalContext();
     globalContext->prepareContextIfNeeded(document->view()->hostWindow());
     if (!globalContext->context())
         return 0;
 
     return FECustomFilter::create(filter, globalContext->context(), operation->validatedProgram(), operation->parameters(),
         operation->meshRows(), operation->meshColumns(),  operation->meshType());
 }
 
 FilterEffectRenderer::FilterEffectRenderer()
-    : m_graphicsBufferAttached(false)
+    : Filter(AffineTransform())
+    , m_graphicsBufferAttached(false)
     , m_hasFilterThatMovesPixels(false)
     , m_hasCustomShaderFilter(false)
 {
     setFilterResolution(FloatSize(1, 1));
     m_sourceGraphic = SourceGraphic::create(this);
 }
 
 FilterEffectRenderer::~FilterEffectRenderer()
 {
 }
@@ skipping 385 matching lines @@
     
     m_savedGraphicsContext->drawImageBuffer(filter->output(), m_renderLayer->renderer()->style()->colorSpace(), pixelSnappedIntRect(destRect), CompositeSourceOver);
     
     filter->clearIntermediateResults();
     
     return m_savedGraphicsContext;
 }
 
 } // namespace WebCore