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

ui/aura/remote_window_tree_host_win.cc

 // 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.
 
 #include "ui/aura/remote_window_tree_host_win.h"
 
 #include <windows.h>
 
 #include <algorithm>
 
@@ skipping 165 matching lines @@
   DestroyCompositor();
   DestroyDispatcher();
   g_instance = NULL;
 }
 
 // static
 bool RemoteWindowTreeHostWin::IsValid() {
   return Instance()->remote_window_ != NULL;
 }
 
-void RemoteWindowTreeHostWin::SetRemoteWindowHandle(HWND remote_window) {
+void RemoteWindowTreeHostWin::InitializeRemoteWindowAndScaleFactor(
+    HWND remote_window,
+    float device_scale) {
   remote_window_ = remote_window;
+  gfx::InitDeviceScaleFactor(device_scale);
   // Do not create compositor here, but in Connected() below.
   // See http://crbug.com/330179 and http://crbug.com/334380.
 }
 
 void RemoteWindowTreeHostWin::Connected(IPC::Sender* host) {
   CHECK(host_ == NULL);
   DCHECK(remote_window_);
   host_ = host;
   // Recreate the compositor for the target surface represented by the
   // remote_window HWND.
@@ skipping 541 matching lines @@
 }
 
 void RemoteWindowTreeHostWin::SetEventFlags(uint32 flags) {
   if (flags == event_flags_)
     return;
   event_flags_ = flags;
   SetVirtualKeyStates(event_flags_);
 }
 
 }  // namespace aura