Plumb physical backing size from RWHV to renderer CC.

content/port/browser/render_widget_host_view_port.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_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 #define CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 
 #include "base/callback.h"
 #include "base/process_util.h"
 #include "base/string16.h"
@@ skipping 211 matching lines @@
 
   // Return true if the view has an accelerated surface that contains the last
   // presented frame for the view. If |desired_size| is non-empty, true is
   // returned only if the accelerated surface size matches.
   virtual bool HasAcceleratedSurface(const gfx::Size& desired_size) = 0;
 
   virtual void OnSwapCompositorFrame(const cc::CompositorFrame& frame) = 0;
 
   virtual void GetScreenInfo(WebKit::WebScreenInfo* results) = 0;
 
+  // The size of the view's backing surface in non-DPI-adjusted pixels.
+  virtual gfx::Size GetPhysicalBackingSize() const = 0;
+
   // Gets the bounds of the window, in screen coordinates.
   virtual gfx::Rect GetBoundsInRootWindow() = 0;
 
   virtual gfx::GLSurfaceHandle GetCompositingSurface() = 0;
 
   // Because the associated remote WebKit instance can asynchronously
   // prevent-default on a dispatched touch event, the touch events are queued in
   // the GestureRecognizer until invocation of ProcessAckedTouchEvent releases
   // it to be consumed (when |ack_result| is NOT_CONSUMED OR NO_CONSUMER_EXISTS)
   // or ignored (when |ack_result| is CONSUMED).
@@ skipping 47 matching lines @@
 #endif
 
 #if defined(OS_WIN) && !defined(USE_AURA)
   virtual void WillWmDestroy() = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_