Send the device scale factor from Windows 8 ASH during initialization via the MetroViewerHostMsg_Se…

win8/viewer/metro_viewer_process_host.h

 // Copyright (c) 2013 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 WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
 #define WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
@@ skipping 46 matching lines @@
  private:
   // IPC::Sender implementation:
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // IPC::Listener implementation:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnChannelError() OVERRIDE = 0;
 
   // Called over IPC by the viewer process to tell this host that it should be
   // drawing to |target_surface|.
-  virtual void OnSetTargetSurface(gfx::NativeViewId target_surface) = 0;
+  virtual void OnSetTargetSurface(gfx::NativeViewId target_surface,
+                                  float device_scale) = 0;
 
   // Called over IPC by the viewer process to request that the url passed in be
   // opened.
   virtual void OnOpenURL(const base::string16& url) = 0;
 
   // Called over IPC by the viewer process to request that the search string
   // passed in is passed to the default search provider and a URL navigation be
   // performed.
   virtual void OnHandleSearchRequest(const base::string16& search_string) = 0;
 
@@ skipping 21 matching lines @@
   scoped_ptr<IPC::ChannelProxy> channel_;
   scoped_ptr<base::WaitableEvent> channel_connected_event_;
   scoped_refptr<InternalMessageFilter> message_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(MetroViewerProcessHost);
 };
 
 }  // namespace win8
 
 #endif  // WIN8_VIEWER_METRO_VIEWER_PROCESS_HOST_H_