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

ui/gfx/vector_icons/system_tray_cast.icon

Index: ui/gfx/vector_icons/system_tray_cast.icon
diff --git a/ui/gfx/vector_icons/system_tray_cast.icon b/ui/gfx/vector_icons/system_tray_cast.icon
deleted file mode 100644
index 7de458f802fa17afe9728aedc319eb3fbe0a885f..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_tray_cast.icon
+++ /dev/null
@@ -1,55 +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, 32,
-MOVE_TO, 4, 4,
-R_H_LINE_TO, 24,
-R_V_LINE_TO, 24,
-H_LINE_TO, 4,
-CLOSE,
-MOVE_TO, 4, 4,
-R_H_LINE_TO, 24,
-R_V_LINE_TO, 24,
-H_LINE_TO, 4,
-CLOSE,
-MOVE_TO, 5, 22,
-R_V_LINE_TO, 3,
-R_H_LINE_TO, 3,
-R_CUBIC_TO, 0, -1.66f, -1.34f, -3, -3, -3,
-CLOSE,
-R_MOVE_TO, 0, -4,
-R_V_LINE_TO, 2,
-R_CUBIC_TO, 2.76f, 0, 5, 2.24f, 5, 5,
-R_H_LINE_TO, 2,
-R_CUBIC_TO, 0, -3.87f, -3.13f, -7, -7, -7,
-CLOSE,
-R_MOVE_TO, 18, -7,
-H_LINE_TO, 9,
-R_V_LINE_TO, 1.63f,
-R_CUBIC_TO, 3.96f, 1.28f, 7.09f, 4.41f, 8.37f, 8.37f,
-H_LINE_TO, 23,
-V_LINE_TO, 11,
-CLOSE,
-MOVE_TO, 5, 14,
-R_V_LINE_TO, 2,
-R_ARC_TO, 9, 9, 0, 0, 1, 9, 9,
-R_H_LINE_TO, 2,
-R_CUBIC_TO, 0, -6.08f, -4.93f, -11, -11, -11,
-CLOSE,
-R_MOVE_TO, 20, -7,
-H_LINE_TO, 7,
-R_CUBIC_TO, -1.1f, 0, -2, 0.9f, -2, 2,
-R_V_LINE_TO, 3,
-R_H_LINE_TO, 2,
-V_LINE_TO, 9,
-R_H_LINE_TO, 18,
-R_V_LINE_TO, 14,
-R_H_LINE_TO, -7,
-R_V_LINE_TO, 2,
-R_H_LINE_TO, 7,
-R_CUBIC_TO, 1.1f, 0, 2, -0.9f, 2, -2,
-V_LINE_TO, 9,
-R_CUBIC_TO, 0, -1.1f, -0.9f, -2, -2, -2,
-CLOSE,
-END