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

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

Index: ui/gfx/vector_icons/system_menu_accessibility.1x.icon
diff --git a/ui/gfx/vector_icons/system_menu_accessibility.1x.icon b/ui/gfx/vector_icons/system_menu_accessibility.1x.icon
deleted file mode 100644
index bd185994b402c05ea89257dd54dfbd42849dace2..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_menu_accessibility.1x.icon
+++ /dev/null
@@ -1,25 +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, 20,
-MOVE_TO, 10.04f, 6.27f,
-R_CUBIC_TO, -2.64f, 0, -4.46f, 0.24f, -7.61f, -1.15f,
-V_LINE_TO, 7,
-R_CUBIC_TO, 1.55f, 0.53f, 2.9f, 0.8f, 4.57f, 1,
-R_V_LINE_TO, 10,
-R_H_LINE_TO, 2,
-R_V_LINE_TO, -5,
-R_H_LINE_TO, 2,
-R_V_LINE_TO, 5,
-R_H_LINE_TO, 2,
-V_LINE_TO, 8,
-R_CUBIC_TO, 1.67f, -0.2f, 2.95f, -0.47f, 4.5f, -1,
-V_LINE_TO, 5.12f,
-R_CUBIC_TO, -2.88f, 1.34f, -4.82f, 1.15f, -7.46f, 1.15f,
-CLOSE,
-MOVE_TO, 10, 5,
-R_ARC_TO, 2, 2, 0, 1, 0, 0, -4,
-R_ARC_TO, 2, 2, 0, 0, 0, 0, 4,
-CLOSE,
-END