Remove dependency on ui::ScaleFactor from ui/gfx

ui/base/resource/resource_bundle.h

Index: ui/base/resource/resource_bundle.h
diff --git a/ui/base/resource/resource_bundle.h b/ui/base/resource/resource_bundle.h
index f9a34df3f1be4584ed11c820dc94e69152d219d2..bea12c19a25d65067a9989d43293a58a34d64bf9 100644
--- a/ui/base/resource/resource_bundle.h
+++ b/ui/base/resource/resource_bundle.h
@@ -255,9 +255,7 @@ class UI_EXPORT ResourceBundle {
 
   // Returns the maximum scale factor currently loaded.
   // Returns SCALE_FACTOR_100P if no resource is loaded.
-  ScaleFactor max_scale_factor() const {
-    return max_scale_factor_;
-  }
+  ScaleFactor GetMaxScaleFactor() const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ResourceBundleTest, DelegateGetPathForLocalePack);
@@ -274,6 +272,9 @@ class UI_EXPORT ResourceBundle {
   explicit ResourceBundle(Delegate* delegate);
   ~ResourceBundle();
 
+  // Shared initialization.
+  static void InitSharedInstance(Delegate* delegate);
+
   // Free skia_images_.
   void FreeImages();