Add 1.6x mode.

ui/display/test/display_manager_test_api.h

Index: ui/display/test/display_manager_test_api.h
diff --git a/ui/display/test/display_manager_test_api.h b/ui/display/test/display_manager_test_api.h
index 429a2b2d41f0335800e390a1252f446182891139..89bcb5b89b90bd5af50729ecd443f633d54d5466 100644
--- a/ui/display/test/display_manager_test_api.h
+++ b/ui/display/test/display_manager_test_api.h
@@ -71,15 +71,6 @@ class DISPLAY_EXPORT DisplayManagerTestApi {
   DISALLOW_COPY_AND_ASSIGN(DisplayManagerTestApi);
 };
 
-class DISPLAY_EXPORT ScopedDisable125DSFForUIScaling {
- public:
-  ScopedDisable125DSFForUIScaling();
-  ~ScopedDisable125DSFForUIScaling();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisable125DSFForUIScaling);
-};
-
 class DISPLAY_EXPORT ScopedSetInternalDisplayId {
  public:
   ScopedSetInternalDisplayId(DisplayManager* test_api, int64_t id);