Handle webuis when using the network service.

content/browser/webui/web_ui_url_loader_factory.h

Index: content/browser/webui/web_ui_url_loader_factory.h
diff --git a/content/browser/webui/web_ui_url_loader_factory.h b/content/browser/webui/web_ui_url_loader_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..cf085f51ce652978a66a9382af73f402748008ea
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+++ b/content/browser/webui/web_ui_url_loader_factory.h
@@ -0,0 +1,18 @@
+// 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.
+
+#ifndef CONTENT_BROWSER_WEBUI_WEB_UI_URL_LOADER_FACTORY_H_
+#define CONTENT_BROWSER_WEBUI_WEB_UI_URL_LOADER_FACTORY_H_
+
+#include "content/common/url_loader_factory.mojom.h"
+
+namespace content {
+class FrameTreeNode;
+
+// Returns a URLLoaderFactory interface pointer for serving WebUI requests.
+mojom::URLLoaderFactoryPtr GetWebUIURLLoader(FrameTreeNode* node);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_WEBUI_WEB_UI_URL_LOADER_FACTORY_H_