Implement InterpolationMedium to filter animated images

Source/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 166 matching lines @@
         return false;
     blink::WebGraphicsContext3D* context3D = provider->context3d();
     Platform3DObject tex = m_surface->getBackingTexture();
     if (!context3D || !tex)
         return false;
     m_surface->invalidateCachedBitmap();
     return drawingBuffer->copyToPlatformTexture(context3D, tex, GL_RGBA,
         GL_UNSIGNED_BYTE, 0, true, false);
 }
 
-void ImageBuffer::draw(GraphicsContext* context, const FloatRect& destRect, const FloatRect& srcRect,
-    CompositeOperator op, blink::WebBlendMode blendMode, bool useLowQualityScale)
+void ImageBuffer::draw(GraphicsContext* context, const FloatRect& destRect, const FloatRect& srcRect, CompositeOperator op, blink::WebBlendMode blendMode)
 {
     if (!isValid())
         return;
 
     SkBitmap bitmap = m_surface->bitmap();
     // For ImageBufferSurface that enables cachedBitmap, Use the cached Bitmap for CPU side usage
     // if it is available, otherwise generate and use it.
     if (!context->isAccelerated() && m_surface->isAccelerated() && m_surface->cachedBitmapEnabled() && m_surface->isValid()) {
         m_surface->updateCachedBitmapIfNeeded();
         bitmap = m_surface->cachedBitmap();
     }
 
     RefPtr<Image> image = BitmapImage::create(NativeImageSkia::create(drawNeedsCopy(m_context.get(), context) ? deepSkBitmapCopy(bitmap) : bitmap));
 
-    context->drawImage(image.get(), destRect, srcRect, op, blendMode, DoNotRespectImageOrientation, useLowQualityScale);
+    context->drawImage(image.get(), destRect, srcRect, op, blendMode, DoNotRespectImageOrientation);
 }
 
 void ImageBuffer::flush()
 {
     if (m_surface->canvas()) {
         m_surface->canvas()->flush();
     }
 }
 
 void ImageBuffer::drawPattern(GraphicsContext* context, const FloatRect& srcRect, const FloatSize& scale,
@@ skipping 169 matching lines @@
     if (!encodeImage(imageData, mimeType, quality, &encodedImage))
         return "data:,";
 
     Vector<char> base64Data;
     base64Encode(encodedImage, base64Data);
 
     return "data:" + mimeType + ";base64," + base64Data;
 }
 
 } // namespace WebCore