Move more vector icons into respective directories.

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
deleted file mode 100644
index 2884fdf7fa05efc4481cbf5e4b9224a52f26212a..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/tab_usb_connected.icon
+++ /dev/null
@@ -1,39 +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, 19, 16,
-R_H_LINE_TO, 1,
-R_V_LINE_TO, 2,
-R_H_LINE_TO, -3,
-R_V_LINE_TO, -8,
-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,
-R_H_LINE_TO, -3,
-R_V_LINE_TO, -2,
-R_CUBIC_TO, 0.85f, -0.53f, 1.34f, -1.23f, 1, -2,
-R_CUBIC_TO, 0.34f, -1.27f, -0.64f, -2.25f, -2, -2,
-R_CUBIC_TO, -1.02f, -0.25f, -2, 0.73f, -2, 2,
-R_CUBIC_TO, 0, 0.77f, 0.49f, 1.47f, 1, 2,
-R_V_LINE_TO, 2,
-R_CUBIC_TO, 0.18f, 0.99f, 1.06f, 1.87f, 2, 2,
-R_H_LINE_TO, 3,
-R_V_LINE_TO, 3,
-R_CUBIC_TO, -0.59f, 0.26f, -1.07f, 0.98f, -1, 2,
-R_CUBIC_TO, -0.07f, 1.03f, 0.91f, 2, 2, 2,
-R_CUBIC_TO, 1.29f, 0, 2.27f, -0.97f, 2, -2,
-R_CUBIC_TO, 0.27f, -1.02f, -0.21f, -1.74f, -1, -2,
-R_V_LINE_TO, -3,
-R_H_LINE_TO, 3,
-R_CUBIC_TO, 1.14f, -0.13f, 2.01f, -1.01f, 2, -2,
-R_V_LINE_TO, -2,
-R_H_LINE_TO, 1,
-R_V_LINE_TO, -4,
-R_H_LINE_TO, -4,
-R_V_LINE_TO, 4,
-CLOSE,
-END