cc: Make OutputSurface::Reshape abstract

cc/output/software_output_device.h

 // Copyright 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 CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_
 #define CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 40 matching lines @@
 
   // Ensures that there is a backing buffer available on this instance.
   virtual void EnsureBackbuffer() {}
 
   // VSyncProvider used to update the timer used to schedule draws with the
   // hardware vsync. Return NULL if a provider doesn't exist.
   virtual gfx::VSyncProvider* GetVSyncProvider();
 
  protected:
   gfx::Size viewport_pixel_size_;
-  float scale_factor_;
   gfx::Rect damage_rect_;
   sk_sp<SkSurface> surface_;
   std::unique_ptr<gfx::VSyncProvider> vsync_provider_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SoftwareOutputDevice);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_