Move a bunch of ash-only vector icons to ash/.

ui/gfx/vector_icons/system_tray_battery.icon

Index: ui/gfx/vector_icons/system_tray_battery.icon
diff --git a/ui/gfx/vector_icons/system_tray_battery.icon b/ui/gfx/vector_icons/system_tray_battery.icon
deleted file mode 100644
index f7c86380d8e03f174abe8b62b9823970cab97679..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_tray_battery.icon
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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, 32,
-MOVE_TO, 9, 7.91f,
-CUBIC_TO, 9, 6.86f, 9.9f, 6, 11.01f, 6,
-R_H_LINE_TO, 9.99f,
-CUBIC_TO, 22.1f, 6, 23, 6.86f, 23, 7.91f,
-R_V_LINE_TO, 18.17f,
-CUBIC_TO, 23, 27.14f, 22.1f, 28, 20.99f, 28,
-R_H_LINE_TO, -9.99f,
-CUBIC_TO, 9.9f, 28, 9, 27.14f, 9, 26.09f,
-V_LINE_TO, 7.91f,
-CLOSE,
-MOVE_TO, 19, 4,
-R_V_LINE_TO, 2,
-R_H_LINE_TO, -6,
-V_LINE_TO, 4,
-R_H_LINE_TO, 6,
-CLOSE,
-END