Move Windows DPI Code from ui/gfx to ui/display

ash/display/display_info.cc

Index: ash/display/display_info.cc
diff --git a/ash/display/display_info.cc b/ash/display/display_info.cc
index 74efc87c07f49a8d207d145ef660c1f04f36bde8..9a9e428cdc94fb98defb56de1634d8f1c92e1e4b 100644
--- a/ash/display/display_info.cc
+++ b/ash/display/display_info.cc
@@ -21,7 +21,7 @@
 
 #if defined(OS_WIN)
 #include "ui/aura/window_tree_host.h"
-#include "ui/gfx/win/dpi.h"
+#include "ui/display/win/dpi.h"
 #endif
 
 namespace ash {
@@ -171,7 +171,7 @@ DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
   float device_scale_factor = 1.0f;
   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 #if defined(OS_WIN)
-    device_scale_factor = gfx::GetDPIScale();
+    device_scale_factor = display::win::GetDPIScale();
 #endif
   }