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

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

Index: ui/gfx/vector_icons/system_tray_cast.1x.icon
diff --git a/ui/gfx/vector_icons/system_tray_cast.1x.icon b/ui/gfx/vector_icons/system_tray_cast.1x.icon
deleted file mode 100644
index 3d540ebada15106af93d0f5e6f6beb18a5040914..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_tray_cast.1x.icon
+++ /dev/null
@@ -1,45 +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, 2, 11.5f,
-V_LINE_TO, 13,
-R_H_LINE_TO, 1.5f,
-R_CUBIC_TO, 0, -0.83f, -0.67f, -1.5f, -1.5f, -1.5f,
-CLOSE,
-R_MOVE_TO, 0, -2,
-R_V_LINE_TO, 1,
-ARC_TO, 2.5f, 2.5f, 0, 0, 1, 4.5f, 13,
-R_H_LINE_TO, 1,
-R_CUBIC_TO, 0, -1.93f, -1.56f, -3.5f, -3.5f, -3.5f,
-CLOSE,
-MOVE_TO, 11, 6,
-H_LINE_TO, 4,
-R_V_LINE_TO, 0.82f,
-ARC_TO, 6.52f, 6.52f, 0, 0, 1, 8.19f, 11,
-H_LINE_TO, 11,
-V_LINE_TO, 6,
-CLOSE,
-MOVE_TO, 2, 7.5f,
-R_V_LINE_TO, 1,
-ARC_TO, 4.5f, 4.5f, 0, 0, 1, 6.5f, 13,
-R_H_LINE_TO, 1,
-ARC_TO, 5.5f, 5.5f, 0, 0, 0, 2, 7.5f,
-CLOSE,
-MOVE_TO, 12, 4,
-H_LINE_TO, 3,
-R_CUBIC_TO, -0.55f, 0, -1, 0.45f, -1, 1,
-R_V_LINE_TO, 1.5f,
-R_H_LINE_TO, 1,
-V_LINE_TO, 5,
-R_H_LINE_TO, 9,
-R_V_LINE_TO, 7,
-H_LINE_TO, 8.5f,
-R_V_LINE_TO, 1,
-H_LINE_TO, 12,
-R_CUBIC_TO, 0.55f, 0, 1, -0.45f, 1, -1,
-V_LINE_TO, 5,
-R_CUBIC_TO, 0, -0.55f, -0.45f, -1, -1, -1,
-CLOSE,
-END