Create vector icon resource directory specific to Chrome.

ui/gfx/vector_icons/navigate_back.icon

Index: ui/gfx/vector_icons/navigate_back.icon
diff --git a/ui/gfx/vector_icons/navigate_back.icon b/ui/gfx/vector_icons/navigate_back.icon
deleted file mode 100644
index 4b76b7ed008acc933a7d2ca8708d3254bca43168..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/navigate_back.icon
+++ /dev/null
@@ -1,27 +0,0 @@
-// 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, 32,
-MOVE_TO, 4.22f, 14.03f,
-CUBIC_TO, 3.53f, 14.15f, 3, 14.77f, 3, 15.5f,
-CUBIC_TO, 3, 16.25f, 3.53f, 16.86f, 4.24f, 16.98f,
-LINE_TO, 4.02f, 17.19f,
-LINE_TO, 14.36f, 27.51f,
-CUBIC_TO, 14.65f, 27.81f, 15.05f, 28, 15.5f, 28,
-CUBIC_TO, 16.33f, 28, 17, 27.33f, 17, 26.5f,
-CUBIC_TO, 17, 26.05f, 16.8f, 25.65f, 16.49f, 25.38f,
-LINE_TO, 16.55f, 25.32f,
-LINE_TO, 8.22f, 17,
-LINE_TO, 27.51f, 17,
-CUBIC_TO, 28.33f, 17, 29, 16.33f, 29, 15.5f,
-CUBIC_TO, 29, 14.67f, 28.33f, 14, 27.51f, 14,
-LINE_TO, 8.2f, 14,
-LINE_TO, 16.55f, 5.66f,
-CUBIC_TO, 16.81f, 5.34f, 17, 4.94f, 17, 4.5f,
-CUBIC_TO, 17, 3.68f, 16.33f, 3, 15.5f, 3,
-CUBIC_TO, 15.06f, 3, 14.66f, 3.2f, 14.39f, 3.5f,
-LINE_TO, 14.36f, 3.47f,
-LINE_TO, 4, 13.81f,
-CLOSE,
-END