Set the device scale factor from the compositor interface

content/browser/renderer_host/compositor_impl_android.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_COMPOSITOR_IMPL_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 29 matching lines @@
   static bool IsInitialized();
   static bool IsThreadingEnabled();
 
   // Returns true if initialized with DIRECT_CONTEXT_ON_DRAW_THREAD.
   static bool UsesDirectGL();
 
   // Compositor implementation.
   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) OVERRIDE;
   virtual void SetWindowSurface(ANativeWindow* window) OVERRIDE;
   virtual void SetVisible(bool visible) OVERRIDE;
+  virtual void setDeviceScaleFactor(float factor) OVERRIDE;
   virtual void SetWindowBounds(const gfx::Size& size) OVERRIDE;
   virtual void SetHasTransparentBackground(bool flag) OVERRIDE;
   virtual bool CompositeAndReadback(
       void *pixels, const gfx::Rect& rect) OVERRIDE;
   virtual void Composite() OVERRIDE;
   virtual WebKit::WebGLId GenerateTexture(gfx::JavaBitmap& bitmap) OVERRIDE;
   virtual WebKit::WebGLId GenerateCompressedTexture(
       gfx::Size& size, int data_size, void* data) OVERRIDE;
   virtual void DeleteTexture(WebKit::WebGLId texture_id) OVERRIDE;
   virtual bool CopyTextureToBitmap(WebKit::WebGLId texture_id,
@@ skipping 40 matching lines @@
 
   Compositor::Client* client_;
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_