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

ui/base/win/dpi.h

 // 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.
 
 #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"
 
 namespace ui {
 
 UI_EXPORT gfx::Size GetDPI();
 
 // Gets the scale factor of the display. For example, if the display DPI is
 // 96 then the scale factor is 1.0.
 UI_EXPORT float GetDPIScale();
 
 UI_EXPORT bool IsInHighDPIMode();
 
 UI_EXPORT void EnableHighDPISupport();
 
+// TODO(kevers,girard):  Should above methods be inside a win namespace since
+// they are also Windows specific.
+
+namespace win {
+
+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_