Use vector icon for Ash shelf launcher

ui/gfx/vector_icons/shelf_launcher.1x.icon

Index: ui/gfx/vector_icons/shelf_launcher.1x.icon
diff --git a/ui/gfx/vector_icons/shelf_launcher.1x.icon b/ui/gfx/vector_icons/shelf_launcher.1x.icon
new file mode 100644
index 0000000000000000000000000000000000000000..946831ccf05edde5befaa4315f23f80b908f2e6f
--- /dev/null
+++ b/ui/gfx/vector_icons/shelf_launcher.1x.icon
@@ -0,0 +1,24 @@
+// Copyright 2016 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.
+
+CANVAS_DIMENSIONS, 13,
+MOVE_TO, 4.83f, 8.18f,
+R_ARC_TO, 3.34f, 3.34f, 0, 0, 1, -3.34f, -3.34f,
+ARC_TO, 3.34f, 3.34f, 0, 0, 1, 4.83f, 1.49f, 
+ARC_TO, 3.34f, 3.34f, 0, 0, 1, 8.18f, 4.83f,
+R_ARC_TO, 3.34f, 3.34f, 0, 0, 1, -3.34f, 3.35f,
+CLOSE,
+R_MOVE_TO, 4.46f, 0,
+R_H_LINE_TO, -0.59f,
+R_LINE_TO, -0.21f, -0.2f,
+ARC_TO, 4.81f, 4.81f, 0, 0, 0, 9.66f, 4.83f, 
+ARC_TO, 4.83f, 4.83f, 0, 1, 0, 4.83f, 9.66f,
+R_ARC_TO, 4.81f, 4.81f, 0, 0, 0, 3.14f, -1.17f,
+R_LINE_TO, 0.2f, 0.21f,
+R_V_LINE_TO, 0.59f,
+LINE_TO, 11.89f, 13,
+LINE_TO, 13, 11.89f,
+LINE_TO, 9.29f, 8.18f,
+CLOSE,
+END