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

ui/gfx/display.h

Index: ui/gfx/display.h
diff --git a/ui/gfx/display.h b/ui/gfx/display.h
index 5abe1be2cbc8a78c16a33b5da44c9695a323ddc3..023ba99254b9e4aea035b29132fe0681b7aeced1 100644
--- a/ui/gfx/display.h
+++ b/ui/gfx/display.h
@@ -28,6 +28,10 @@ class UI_EXPORT Display {
   // "--force-device-scale-factor".
   static float GetForcedDeviceScaleFactor();
 
+  // Indicates if a device scale factor is being explicitly enforced from the
+  // command line via "--force-device-scale-factor".
+  static bool HasForceDeviceScaleFactor();
+
   // Returns 64-bit persistent ID for the specified manufacturer's ID and
   // serial#.
   static int64 GetID(uint16 manufacturer_id, uint32 serial_number);