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

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

Index: ui/gfx/vector_icons/system_tray_screen_share.1x.icon
diff --git a/ui/gfx/vector_icons/system_tray_screen_share.1x.icon b/ui/gfx/vector_icons/system_tray_screen_share.1x.icon
deleted file mode 100644
index 4667ae3feb483e56f757738792b3453adec05be3..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_tray_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, 16,
-MOVE_TO, 14, 10.5f,
-R_V_LINE_TO, -6,
-R_CUBIC_TO, 0.17f, -0.92f, -0.43f, -1.5f, -1, -1.5f,
-H_LINE_TO, 3,
-R_CUBIC_TO, -0.57f, 0, -1.17f, 0.58f, -1, 1.5f,
-R_V_LINE_TO, 6,
-R_CUBIC_TO, 0, 1, 1, 1.5f, 1.5f, 1.5f,
-H_LINE_TO, 1,
-R_V_LINE_TO, 1,
-R_H_LINE_TO, 14,
-R_V_LINE_TO, -1,
-R_H_LINE_TO, -2.25f,
-R_CUBIC_TO, 0.5f, 0, 1.25f, -0.5f, 1.25f, -1.5f,
-CLOSE,
-MOVE_TO, 9, 8,
-R_CUBIC_TO, -2.2f, 0.13f, -3.46f, 0.71f, -4.5f, 2,
-CUBIC_TO, 4.92f, 8.16f, 5.97f, 6.34f, 9, 6,
-V_LINE_TO, 4.5f,
-LINE_TO, 12, 7,
-LINE_TO, 9, 9.5f,
-V_LINE_TO, 8,
-CLOSE,
-END