Fix display list canvas not rendering correctly on high dpi displays

Source/platform/graphics/RecordingImageBufferSurface.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "platform/graphics/RecordingImageBufferSurface.h"
 
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/ImageBuffer.h"
@@ skipping 160 matching lines @@
     return true;
 }
 
 void RecordingImageBufferSurface::willDrawVideo()
 {
     // Video draws need to be synchronous
     if (!m_fallbackSurface)
         fallBackToRasterCanvas();
 }
 
+void RecordingImageBufferSurface::draw(GraphicsContext* context, const FloatRect& destRect, const FloatRect& srcRect, CompositeOperator op, WebBlendMode blendMode, bool needsCopy)
+{
+    if (m_fallbackSurface) {
+        m_fallbackSurface->draw(context, destRect, srcRect, op, blendMode, needsCopy);
+        return;
+    }
+
+    RefPtr<SkPicture> picture = getPicture();
+    if (picture) {
+        context->compositePicture(picture.get(), destRect, srcRect, op, blendMode);
+    } else {
+        ImageBufferSurface::draw(context, destRect, srcRect, op, blendMode, needsCopy);
+    }
+}
+
 // Fallback passthroughs
 
 const SkBitmap& RecordingImageBufferSurface::bitmap()
 {
     if (m_fallbackSurface)
         return m_fallbackSurface->bitmap();
     return ImageBufferSurface::bitmap();
 }
 
 bool RecordingImageBufferSurface::restore()
@@ skipping 56 matching lines @@
 
 void RecordingImageBufferSurface::setIsHidden(bool hidden)
 {
     if (m_fallbackSurface)
         m_fallbackSurface->setIsHidden(hidden);
     else
         ImageBufferSurface::setIsHidden(hidden);
 }
 
 } // namespace blink