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

ui/gfx/vector_icons/system_tray_battery_unreliable.icon

Index: ui/gfx/vector_icons/system_tray_battery_unreliable.icon
diff --git a/ui/gfx/vector_icons/system_tray_battery_unreliable.icon b/ui/gfx/vector_icons/system_tray_battery_unreliable.icon
deleted file mode 100644
index 371f6b2d33a157235071798bdc33a18eebb542a1..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_tray_battery_unreliable.icon
+++ /dev/null
@@ -1,16 +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, 13.51f, 17.98f,
-R_CUBIC_TO, -1.98f, 0.02f, -2.5f, 1, -2.5f, 1,
-R_V_LINE_TO, -1.97f,
-CUBIC_TO, 11.01f, 17.01f, 11.55f, 16, 13.52f, 16,
-R_CUBIC_TO, 1.97f, 0, 3, 1.95f, 5.05f, 1.95f,
-CUBIC_TO, 20.62f, 17.95f, 21, 17, 21, 17,
-R_V_LINE_TO, 1.98f,
-R_CUBIC_TO, 0, 0, -0.38f, 1.05f, -2.44f, 1.05f,
-R_CUBIC_TO, -2.06f, 0, -3.07f, -2.08f, -5.06f, -2.05f,
-CLOSE,
-END