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

win8/metro_driver/display_properties.cc

Index: win8/metro_driver/display_properties.cc
diff --git a/win8/metro_driver/display_properties.cc b/win8/metro_driver/display_properties.cc
index f1653fdbd7b2d61f74de8f08436e0ac4fe2fb44f..7eb557f6a9164b1caf727fd470080d94490f9730 100644
--- a/win8/metro_driver/display_properties.cc
+++ b/win8/metro_driver/display_properties.cc
@@ -9,15 +9,10 @@
 #include <wrl\wrappers\corewrappers.h>
 #include <windows.foundation.h>
 #include <windows.graphics.display.h>
-#include "base/win/scoped_com_initializer.h"
+#include "ui/gfx/win/dpi.h"
 #include "winrt_utils.h"
 
-#pragma comment(lib, "runtimeobject.lib")
-
-extern "C" {
-
-__declspec(dllexport) float GetModernUIScale() {
-  base::win::ScopedCOMInitializer com_init;
+float GetModernUIScale() {
   Microsoft::WRL::ComPtr<
       ABI::Windows::Graphics::Display::IDisplayPropertiesStatics>
       display_properties;
@@ -30,5 +25,3 @@ __declspec(dllexport) float GetModernUIScale() {
   }
   return 1.0f;
 }
-
-}