Update IOSurface scale factor before compare

content/browser/renderer_host/compositing_iosurface_mac.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_MAC_H_
 
 #include <deque>
 #include <vector>
 
@@ skipping 96 matching lines @@
   void ClearDrawable();
 
   bool HasIOSurface() { return !!io_surface_.get(); }
 
   const gfx::Size& pixel_io_surface_size() const {
     return pixel_io_surface_size_;
   }
   // In cocoa view units / DIPs.
   const gfx::Size& io_surface_size() const { return io_surface_size_; }
 
+  void SetDeviceScaleFactor(float scale_factor);
+
   bool is_vsync_disabled() const;
 
   // Get vsync scheduling parameters.
   // |interval_numerator/interval_denominator| equates to fractional number of
   // seconds between vsyncs.
   void GetVSyncParameters(base::TimeTicks* timebase,
                           uint32* interval_numerator,
                           uint32* interval_denominator);
 
   // Returns true if asynchronous readback is supported on this system.
@@ skipping 199 matching lines @@
   // A pool of CopyContexts with OpenGL objects ready for re-use.  Prefer to
   // pull one from the pool before creating a new CopyContext.
   std::vector<CopyContext*> copy_context_pool_;
 
   // CopyContexts being used for in-flight copy operations.
   std::deque<CopyContext*> copy_requests_;
 
   // Timer for finishing a copy operation.
   base::Timer finish_copy_timer_;
 
-  SurfaceQuad quad_;
-
   // CVDisplayLink for querying Vsync timing info and throttling swaps.
   CVDisplayLinkRef display_link_;
 
   // Timer for stopping display link after a timeout with no swaps.
   base::DelayTimer<CompositingIOSurfaceMac> display_link_stop_timer_;
 
   // Lock for sharing data between UI thread and display-link thread.
   base::Lock lock_;
 
   // Counts for throttling swaps.
   int64 vsync_count_;
   int64 swap_count_;
 
   // Vsync timing data.
   base::TimeTicks vsync_timebase_;
   uint32 vsync_interval_numerator_;
   uint32 vsync_interval_denominator_;
 
   bool initialized_is_intel_;
   bool is_intel_;
   GLint screen_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_MAC_H_