Move more vector icons to more appropriate directories.

ui/vector_icons/extension.icon

Index: ui/vector_icons/extension.icon
diff --git a/ui/vector_icons/extension.icon b/ui/vector_icons/extension.icon
new file mode 100644
index 0000000000000000000000000000000000000000..75fe2c8060095c7dc998853ba77a5e262a9bef2d
--- /dev/null
+++ b/ui/vector_icons/extension.icon
@@ -0,0 +1,35 @@
+// 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.
+
+MOVE_TO, 41, 22,
+R_H_LINE_TO, -3,
+R_V_LINE_TO, -8,
+R_CUBIC_TO, 0, -2.21f, -1.79f, -4, -4, -4,
+R_H_LINE_TO, -8,
+V_LINE_TO, 7,
+R_CUBIC_TO, 0, -2.76f, -2.24f, -5, -5, -5,
+R_CUBIC_TO, -2.76f, 0, -5, 2.24f, -5, 5,
+R_V_LINE_TO, 3,
+H_LINE_TO, 8,
+R_CUBIC_TO, -2.21f, 0, -3.98f, 1.79f, -3.98f, 4,
+R_LINE_TO, -0.01f, 7.6f,
+H_LINE_TO, 7,
+R_CUBIC_TO, 2.98f, 0, 5.4f, 2.42f, 5.4f, 5.4f,
+R_CUBIC_TO, 0, 2.98f, -2.42f, 5.4f, -5.4f, 5.4f,
+H_LINE_TO, 4.01f,
+LINE_TO, 4, 40,
+R_CUBIC_TO, 0, 2.21f, 1.79f, 4, 4, 4,
+R_H_LINE_TO, 7.6f,
+R_V_LINE_TO, -3,
+R_CUBIC_TO, 0, -2.98f, 2.42f, -5.4f, 5.4f, -5.4f,
+R_CUBIC_TO, 2.98f, 0, 5.4f, 2.42f, 5.4f, 5.4f,
+R_V_LINE_TO, 3,
+H_LINE_TO, 34,
+R_CUBIC_TO, 2.21f, 0, 4, -1.79f, 4, -4,
+R_V_LINE_TO, -8,
+R_H_LINE_TO, 3,
+R_CUBIC_TO, 2.76f, 0, 5, -2.24f, 5, -5,
+R_CUBIC_TO, 0, -2.76f, -2.24f, -5, -5, -5,
+CLOSE,
+END