Move more vector icons into respective directories.

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

Index: ui/gfx/vector_icons/tab_usb_connected.1x.icon
diff --git a/ui/gfx/vector_icons/tab_usb_connected.1x.icon b/ui/gfx/vector_icons/tab_usb_connected.1x.icon
deleted file mode 100644
index 00cc79545f11caf368c500ed9266db4698d42ad0..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/tab_usb_connected.1x.icon
+++ /dev/null
@@ -1,38 +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, 16,
-MOVE_TO, 10, 8,
-R_H_LINE_TO, 1,
-R_V_LINE_TO, 1,
-H_LINE_TO, 9,
-V_LINE_TO, 5,
-R_H_LINE_TO, 1,
-LINE_TO, 8.5f, 3,
-LINE_TO, 7, 5,
-R_H_LINE_TO, 1,
-R_V_LINE_TO, 4,
-H_LINE_TO, 7,
-V_LINE_TO, 8,
-R_CUBIC_TO, -0.08f, -0.04f, 0, -0.5f, 0, -1,
-R_CUBIC_TO, 0, -0.5f, -0.5f, -1, -1, -1,
-R_CUBIC_TO, -0.5f, 0, -1, 0.5f, -1, 1,
-R_CUBIC_TO, 0, 0.5f, 0.25f, 0.96f, 1, 1,
-R_V_LINE_TO, 1,
-R_CUBIC_TO, 0, 0.5f, 0.5f, 1, 1, 1,
-R_H_LINE_TO, 1,
-R_V_LINE_TO, 2,
-R_LINE_TO, -1, 1,
-R_LINE_TO, 1, 1,
-R_H_LINE_TO, 1,
-R_LINE_TO, 1, -1,
-R_LINE_TO, -1, -1,
-R_V_LINE_TO, -2,
-R_H_LINE_TO, 2,
-R_CUBIC_TO, 0.5f, 0, 1, -0.5f, 1, -1,
-V_LINE_TO, 6,
-R_H_LINE_TO, -2,
-R_V_LINE_TO, 2,
-CLOSE,
-END