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

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

Index: ui/gfx/vector_icons/system_menu_screen_share.1x.icon
diff --git a/ui/gfx/vector_icons/system_menu_screen_share.1x.icon b/ui/gfx/vector_icons/system_menu_screen_share.1x.icon
deleted file mode 100644
index a94882e8e97ab6497bc8492e561793f8bbcf83ff..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_menu_screen_share.1x.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, 20,
-MOVE_TO, 14.5f, 14,
-R_CUBIC_TO, 0.5f, 0, 1.5f, -0.5f, 1.5f, -1.5f,
-R_V_LINE_TO, -6,
-R_CUBIC_TO, 0, -1, -0.5f, -1.5f, -1.5f, -1.5f,
-R_H_LINE_TO, -9,
-CUBIC_TO, 4.5f, 5, 4, 5.5f, 4, 6.5f,
-R_V_LINE_TO, 6,
-R_CUBIC_TO, 0, 1, 0.5f, 1.5f, 1.5f, 1.5f,
-H_LINE_TO, 2,
-R_V_LINE_TO, 1,
-R_H_LINE_TO, 16,
-R_V_LINE_TO, -1,
-R_H_LINE_TO, -3.5f,
-CLOSE,
-R_MOVE_TO, -3.81f, -2.5f,
-R_V_LINE_TO, -1,
-R_CUBIC_TO, -1.76f, -0.2f, -2.86f, 0.33f, -3.69f, 1.5f,
-R_CUBIC_TO, 0.34f, -1.67f, 1.27f, -3.33f, 3.69f, -3.5f,
-V_LINE_TO, 7,
-LINE_TO, 13, 9.5f,
-R_LINE_TO, -2.31f, 2,
-CLOSE,
-END