Fix high-DPI on Windows to make use of DIP scaling in WebKit.

ui/base/win/dpi.h

Index: ui/base/win/dpi.h
diff --git a/ui/base/win/dpi.h b/ui/base/win/dpi.h
index 930922a0c4ad21d4c0d6c474a2bca49b0fb888aa..99252c71d7f0e4af4c7d5a791e7df4fdce980bc6 100644
--- a/ui/base/win/dpi.h
+++ b/ui/base/win/dpi.h
@@ -5,6 +5,8 @@
 #ifndef UI_BASE_WIN_DPI_H_
 #define UI_BASE_WIN_DPI_H_
 
+#include "ui/gfx/point.h"
+#include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "ui/base/ui_export.h"
 
@@ -20,6 +22,24 @@ UI_EXPORT bool IsInHighDPIMode();
 
 UI_EXPORT void EnableHighDPISupport();
 
+// TODO(kevers|girard):  Move above methods into win namespace.
+
+namespace win {
+
+UI_EXPORT float GetDeviceScaleFactor();
+
+UI_EXPORT gfx::Point ScreenToDIPPoint(const gfx::Point& pixel_point);
+
+UI_EXPORT gfx::Rect ScreenToDIPRect(const gfx::Rect& pixel_bounds);
+
+UI_EXPORT gfx::Rect DIPToScreenRect(const gfx::Rect& dip_bounds);
+
+UI_EXPORT gfx::Size ScreenToDIPSize(const gfx::Size& size_in_pixels);
+
+UI_EXPORT gfx::Size DIPToScreenSize(const gfx::Size& dip_size);
+
+}  // namespace win
+
 }  // namespace ui
 
 #endif  // UI_BASE_WIN_DPI_H_