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 284 matching lines @@
     bounds.top = rect.y();
     bounds.right = rect.right();
     bounds.bottom = rect.bottom();
     character_bounds.push_back(bounds);
   }
   host_->Send(new MetroViewerHostMsg_ImeTextInputClientUpdated(
       input_scopes, character_bounds));
 }
 
 gfx::Point PointFromNativeEvent(int32 x, int32 y) {
-  static float scale_factor = gfx::GetModernUIScale();
+  static float scale_factor = gfx::GetDPIScale();
   gfx::Point result( x * scale_factor, y * scale_factor);
   return result;
 }
 
 void RemoteWindowTreeHostWin::OnMouseMoved(int32 x, int32 y, int32 flags) {
   if (ignore_mouse_moves_until_set_cursor_ack_)
     return;
 
   gfx::Point location = PointFromNativeEvent(x, y);
   ui::MouseEvent event(ui::ET_MOUSE_MOVED, location, location, flags, 0);
@@ skipping 236 matching lines @@
 }
 
 void RemoteWindowTreeHostWin::SetEventFlags(uint32 flags) {
   if (flags == event_flags_)
     return;
   event_flags_ = flags;
   SetVirtualKeyStates(event_flags_);
 }
 
 }  // namespace aura