Add palette tray to ash.

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

Index: ui/gfx/vector_icons/palette_tray_icon_default.1x.icon
diff --git a/ui/gfx/vector_icons/palette_tray_icon_default.1x.icon b/ui/gfx/vector_icons/palette_tray_icon_default.1x.icon
new file mode 100644
index 0000000000000000000000000000000000000000..c97c6602f5bb38deb8bfe12c6346e1adb8328189
--- /dev/null
+++ b/ui/gfx/vector_icons/palette_tray_icon_default.1x.icon
@@ -0,0 +1,28 @@
+// Copyright 2015 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, 13.8f, 3.75f,
+R_CUBIC_TO, 0.26f, 0.26f, 0, 0.81f, 0, 0.81f,
+LINE_TO, 9.82f, 8.21f,
+R_LINE_TO, -2.26f, -2.08f,
+R_LINE_TO, 2.03f, -1.94f,
+R_LINE_TO, -0.79f, -0.76f,
+R_LINE_TO, -4.05f, 3.68f,
+R_LINE_TO, -0.82f, -0.61f,
+R_LINE_TO, 4.36f, -4.3f,
+R_CUBIC_TO, 0.26f, -0.26f, 0.87f, -0.26f, 1.12f, 0,
+R_LINE_TO, 0.95f, 0.94f,
+R_LINE_TO, 0.95f, -0.94f,
+R_CUBIC_TO, 0.25f, -0.26f, 0.68f, -0.26f, 0.94f, 0,
+R_LINE_TO, 1.56f, 1.55f,
+CLOSE,
+MOVE_TO, 2.02f, 11.66f,
+LINE_TO, 2, 14,
+R_H_LINE_TO, 2.34f,
+R_LINE_TO, 5.1f, -5.17f,
+R_LINE_TO, -2.22f, -2.02f,
+R_LINE_TO, -5.21f, 4.86f,
+CLOSE,
+END