Delete a bunch of noop paint invalidation code.

sky/engine/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 102 matching lines @@
 {
     return m_client ? m_client->isDirty() : false;
 }
 
 void ImageBuffer::didFinalizeFrame()
 {
     if (m_client)
         m_client->didFinalizeFrame();
 }
 
-void ImageBuffer::finalizeFrame(const FloatRect &dirtyRect)
+void ImageBuffer::finalizeFrame()
 {
-    m_surface->finalizeFrame(dirtyRect);
+    m_surface->finalizeFrame();
     didFinalizeFrame();
 }
 
 bool ImageBuffer::restoreSurface() const
 {
     return m_surface->isValid() || m_surface->restore();
 }
 
 void ImageBuffer::notifySurfaceInvalid()
 {
@@ skipping 286 matching lines @@
     if (!encodeImage(imageData, mimeType, quality, &encodedImage))
         return "data:,";
 
     Vector<char> base64Data;
     base64Encode(encodedImage, base64Data);
 
     return "data:" + mimeType + ";base64," + base64Data;
 }
 
 } // namespace blink