mash: Convert ash shelf overflow bubble to wm common types

ash/common/shelf/wm_shelf.h

Index: ash/common/shelf/wm_shelf.h
diff --git a/ash/common/shelf/wm_shelf.h b/ash/common/shelf/wm_shelf.h
index 1e7ab27bfebb3bbdcbcbe3e6c12fa65252a91c53..8da08b6e2c6730d22f778d25a9b744d6f1a41190 100644
--- a/ash/common/shelf/wm_shelf.h
+++ b/ash/common/shelf/wm_shelf.h
@@ -45,6 +45,14 @@ class ASH_EXPORT WmShelf {
   // Shelf items are slightly dimmed (e.g. when a window is maximized).
   virtual bool IsDimmed() const = 0;
 
+  // Whether the shelf item overflow bubble is visible.
+  // TODO(jamescook): Eliminate when ShelfView moves to //ash/common.

[msw, 2016/07/19 19:14:08]

nit: ditto comment for SchedulePaint()?

[James Cook, 2016/07/19 19:25:13]

Done.

+  // http://crbug.com/615155
+  virtual bool IsShowingOverflowBubble() const = 0;
+
+  // Schedules a repaint for all shelf buttons.
+  virtual void SchedulePaint() = 0;
+
   // Whether the shelf view is visible.
   // TODO(jamescook): Consolidate this with GetVisibilityState().
   virtual bool IsVisible() const = 0;