Use vector assets for media router icons.

ui/gfx/vector_icons/media_router_warning.icon

Index: ui/gfx/vector_icons/media_router_warning.icon
diff --git a/ui/gfx/vector_icons/media_router_warning.icon b/ui/gfx/vector_icons/media_router_warning.icon
new file mode 100644
index 0000000000000000000000000000000000000000..c7813fa332b0aad5eced79595a11a87d8578c544
--- /dev/null
+++ b/ui/gfx/vector_icons/media_router_warning.icon
@@ -0,0 +1,48 @@
+// 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, 19,
+PATH_COLOR_ARGB, 0xFF, 0xF0, 0x93, 0x0,
+MOVE_TO, 16.5f, 2.5f,
+R_H_LINE_TO, -14,
+CUBIC_TO, 1.7f, 2.5f, 1, 3.2f, 1, 4,
+V_LINE_TO, 6.5f,
+R_H_LINE_TO, 1.5f,
+V_LINE_TO, 4,
+R_H_LINE_TO, 14,
+R_V_LINE_TO, 11,
+H_LINE_TO, 11,
+V_LINE_TO, 16.5f,
+R_H_LINE_TO, 5.5f,
+R_CUBIC_TO, 0.81f, 0, 1.5f, -0.7f, 1.5f, -1.5f,
+R_V_LINE_TO, -11,
+R_CUBIC_TO, 0, -0.8f, -0.69f, -1.5f, -1.5f, -1.5f,
+CLOSE,
+MOVE_TO, 1, 8,
+V_LINE_TO, 9.5f,
+R_CUBIC_TO, 3.84f, 0.05f, 6.96f, 3.16f, 7, 7,
+R_H_LINE_TO, 1.5f,
+R_CUBIC_TO, 0, -4.7f, -3.81f, -8.5f, -8.5f, -8.5f,
+CLOSE,
+R_MOVE_TO, 0, 3,
+V_LINE_TO, 12.5f,
+R_CUBIC_TO, 2.17f, 0.07f, 3.93f, 1.83f, 4, 4,
+R_H_LINE_TO, 1.5f,
+R_CUBIC_TO, 0, -3.04f, -2.46f, -5.5f, -5.5f, -5.5f,
+CLOSE,
+R_MOVE_TO, 0, 3,
+V_LINE_TO, 16.5f,
+R_H_LINE_TO, 2.5f,
+R_CUBIC_TO, 0, -1.38f, -1.12f, -2.5f, -2.5f, -2.5f,
+CLOSE,
+MOVE_TO, 14, 14,
+R_H_LINE_TO, 1.5f,
+V_LINE_TO, 12.5f,
+H_LINE_TO, 14,
+MOVE_TO, 14, 11,
+R_H_LINE_TO, 1.5f,
+R_V_LINE_TO, -3,
+H_LINE_TO, 14,
+CLOSE,
+END