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 805d22f7c88fc60590423d620a49e0d4e30d754b..8b3f346902b7b9501fd2acf3ca7d662486c2c95c 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
   // product_code, and the index of the output it is connected to.
   // |output_index| is used to distinguish the displays of the same type. For