Create vector icon resource directory specific to Chrome.

chrome/app/vector_icons/vector_icons.cc.template

Index: chrome/app/vector_icons/vector_icons.cc.template
diff --git a/chrome/app/vector_icons/vector_icons.cc.template b/chrome/app/vector_icons/vector_icons.cc.template
new file mode 100644
index 0000000000000000000000000000000000000000..5c5155e136d7df3258c372ce366ac055401e9686
--- /dev/null
+++ b/chrome/app/vector_icons/vector_icons.cc.template
@@ -0,0 +1,21 @@
+// Copyright 2017 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.
+
+// vector_icons.cc.template is used to generate vector_icons.cc. Edit the former
+// rather than the latter.
+
+#include "chrome/app/vector_icons/vector_icons.h"
+
+#include "base/logging.h"
+#include "ui/gfx/vector_icon_types.h"
+
+#define PATH_ELEMENT_TEMPLATE(path_name, ...) \
+static gfx::PathElement path_name[] = {__VA_ARGS__};
+
+#define VECTOR_ICON_TEMPLATE(icon_name, path_name, path_name_1x) \
+const gfx::VectorIcon icon_name = { path_name , path_name_1x };
+
+using namespace gfx;
+
+TEMPLATE_PLACEHOLDER