Implement tab indicator for WebUSB.

ui/gfx/vector_icons/tab_usb_connected.icon

Index: ui/gfx/vector_icons/tab_usb_connected.icon
diff --git a/ui/gfx/vector_icons/tab_usb_connected.icon b/ui/gfx/vector_icons/tab_usb_connected.icon
new file mode 100644
index 0000000000000000000000000000000000000000..c383dca1eb0cc7e48fce1129057284ab41268bda
--- /dev/null
+++ b/ui/gfx/vector_icons/tab_usb_connected.icon
@@ -0,0 +1,39 @@
+// 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, 24,
+MOVE_TO, 15, 7,
+R_V_LINE_TO, 4,
+R_H_LINE_TO, 1,
+R_V_LINE_TO, 2,
+R_H_LINE_TO, -3,
+V_LINE_TO, 5,
+R_H_LINE_TO, 2,
+R_LINE_TO, -3, -4,
+R_LINE_TO, -3, 4,
+R_H_LINE_TO, 2,
+R_V_LINE_TO, 8,
+H_LINE_TO, 8,
+R_V_LINE_TO, -2.07f,
+R_CUBIC_TO, 0.7f, -0.37f, 1.2f, -1.08f, 1.2f, -1.93f,
+R_CUBIC_TO, 0, -1.21f, -0.99f, -2.2f, -2.2f, -2.2f,
+R_CUBIC_TO, -1.21f, 0, -2.2f, 0.99f, -2.2f, 2.2f,
+R_CUBIC_TO, 0, 0.85f, 0.5f, 1.56f, 1.2f, 1.93f,
+V_LINE_TO, 13,
+R_CUBIC_TO, 0, 1.11f, 0.89f, 2, 2, 2,
+R_H_LINE_TO, 3,
+R_V_LINE_TO, 3.05f,
+R_CUBIC_TO, -0.71f, 0.37f, -1.2f, 1.1f, -1.2f, 1.95f,
+R_CUBIC_TO, 0, 1.22f, 0.99f, 2.2f, 2.2f, 2.2f,
+R_CUBIC_TO, 1.21f, 0, 2.2f, -0.98f, 2.2f, -2.2f,
+R_CUBIC_TO, 0, -0.85f, -0.49f, -1.58f, -1.2f, -1.95f,
+V_LINE_TO, 15,
+R_H_LINE_TO, 3,
+R_CUBIC_TO, 1.11f, 0, 2, -0.89f, 2, -2,
+R_V_LINE_TO, -2,
+R_H_LINE_TO, 1,
+V_LINE_TO, 7,
+R_H_LINE_TO, -4,
+CLOSE,
+END