[ash-md] Remove the number of animators used for the Shelf animations.

ui/gfx/animation/animation_change_type.h

Index: ui/gfx/animation/animation_change_type.h
diff --git a/ui/gfx/animation/animation_change_type.h b/ui/gfx/animation/animation_change_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..d21c81ef108e771b3d3bf570323e1f0f2ce5f0d8
--- /dev/null
+++ b/ui/gfx/animation/animation_change_type.h
@@ -0,0 +1,17 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_GFX_ANIMATION_ANIMATION_CHANGE_TYPE_H_
+#define UI_GFX_ANIMATION_ANIMATION_CHANGE_TYPE_H_
+
+namespace gfx {
+
+enum AnimationChangeType {
+  ANIMATION_CHANGE_ANIMATE,
+  ANIMATION_CHANGE_IMMEDIATE
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_ANIMATION_ANIMATION_CHANGE_TYPE_H_