Animated Rotation

views/view.h

Index: views/view.h
diff --git a/views/view.h b/views/view.h
index c188531537a91bf0919c72854bf614d7a504dafb..60a534c460352bab074c7f7152bf2cd7ba72e1ca 100644
--- a/views/view.h
+++ b/views/view.h
@@ -259,6 +259,11 @@ class VIEWS_EXPORT View : public AcceleratorTarget {
   // painting.
   void SetFillsBoundsOpaquely(bool fills_bounds_opaquely);
 
+  // Used to disable painting (e.g., during an animation when expensive
+  // operations like painting can cause noticeable jank).
+  void set_painting_enabled(bool enabled) { painting_enabled_ = enabled; }
+  bool painting_enabled() const { return painting_enabled_; }
+
   // Transformations -----------------------------------------------------------
 
   // Methods for setting transformations for a view (e.g. rotation, scaling).
@@ -1353,6 +1358,9 @@ class VIEWS_EXPORT View : public AcceleratorTarget {
   // Whether this view is enabled.
   bool enabled_;
 
+  // Whether this view is painting.
+  bool painting_enabled_;
+
   // Whether or not RegisterViewForVisibleBoundsNotification on the RootView
   // has been invoked.
   bool registered_for_visible_bounds_notification_;