ash: Minor cleanup, move more files from launcher to shelf.

ash/shelf/overflow_bubble.h

Index: ash/shelf/overflow_bubble.h
diff --git a/ash/launcher/overflow_bubble.h b/ash/shelf/overflow_bubble.h
similarity index 90%
rename from ash/launcher/overflow_bubble.h
rename to ash/shelf/overflow_bubble.h
index 84fbcc126496ceb6f7862054be44a420641bfc80..8d9378fe64d5b0cc597ec305dc009f7096226362 100644
--- a/ash/launcher/overflow_bubble.h
+++ b/ash/shelf/overflow_bubble.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_LAUNCHER_OVERFLOW_BUBBLE_H_
-#define ASH_LAUNCHER_OVERFLOW_BUBBLE_H_
+#ifndef ASH_SHELF_OVERFLOW_BUBBLE_H_
+#define ASH_SHELF_OVERFLOW_BUBBLE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -49,4 +49,4 @@ class OverflowBubble : public views::WidgetObserver {
 }  // namespace internal
 }  // namespace ash
 
-#endif  // ASH_LAUNCHER_OVERFLOW_BUBBLE_H_
+#endif  // ASH_SHELF_OVERFLOW_BUBBLE_H_