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

ui/gfx/vector_icons/system_menu_screen_share.icon

Index: ui/gfx/vector_icons/system_menu_screen_share.icon
diff --git a/ui/gfx/vector_icons/system_menu_screen_share.icon b/ui/gfx/vector_icons/system_menu_screen_share.icon
deleted file mode 100644
index c77310ea0a9a8a9d0a460bf686de23a2bd361912..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_menu_screen_share.icon
+++ /dev/null
@@ -1,28 +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, 40,
-MOVE_TO, 31, 28,
-R_CUBIC_TO, 1.13f, -0.5f, 2.32f, -1.62f, 2, -3,
-V_LINE_TO, 13,
-R_CUBIC_TO, 0.33f, -1.89f, -0.87f, -3, -2, -3,
-H_LINE_TO, 9,
-R_CUBIC_TO, -1.15f, 0, -2.33f, 1.11f, -2, 3,
-R_V_LINE_TO, 12,
-R_CUBIC_TO, -0.33f, 1.38f, 0.85f, 2.5f, 2, 3,
-H_LINE_TO, 4,
-R_V_LINE_TO, 2,
-R_H_LINE_TO, 32,
-R_V_LINE_TO, -2,
-R_H_LINE_TO, -5,
-CLOSE,
-R_MOVE_TO, -10, -5,
-R_V_LINE_TO, -2,
-R_CUBIC_TO, -3.81f, -0.4f, -6.19f, 0.66f, -8, 3,
-R_CUBIC_TO, 0.73f, -3.34f, 2.74f, -6.66f, 8, -7,
-R_V_LINE_TO, -3,
-R_LINE_TO, 5, 5,
-R_LINE_TO, -5, 4,
-CLOSE,
-END