Plumb physical backing size from RWHV to renderer CC.

content/browser/renderer_host/render_widget_host_impl.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_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 667 matching lines @@
 
   // Set if we are waiting for a repaint ack for the view.
   bool repaint_ack_pending_;
 
   // True when waiting for RESIZE_ACK.
   bool resize_ack_pending_;
 
   // The current size of the RenderWidget.
   gfx::Size current_size_;
 
+  // The size of the view's backing surface in non-DPI-adjusted pixels.
+  gfx::Size physical_backing_size_;
+
   // The size we last sent as requested size to the renderer. |current_size_|
   // is only updated once the resize message has been ack'd. This on the other
   // hand is updated when the resize message is sent. This is very similar to
   // |resize_ack_pending_|, but the latter is not set if the new size has width
   // or height zero, which is why we need this too.
   gfx::Size in_flight_size_;
 
   // The next auto resize to send.
   gfx::Size new_auto_size_;
 
@@ skipping 144 matching lines @@
 #if defined(OS_WIN)
   std::list<HWND> dummy_windows_for_activation_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_