Mojo: Generalize blink::URLRequest -> mojo::URLRequest conversion, and use it

mojo/services/html_viewer/blink_url_request_type_converters.h

Index: mojo/services/html_viewer/blink_url_request_type_converters.h
diff --git a/mojo/services/html_viewer/blink_url_request_type_converters.h b/mojo/services/html_viewer/blink_url_request_type_converters.h
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index 0000000000000000000000000000000000000000..21c34920fd19e76ac78f6fb49cc39f495cf01893
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+++ b/mojo/services/html_viewer/blink_url_request_type_converters.h
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+// Copyright 2014 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 MOJO_SERVICES_HTML_VIEWER_BLINK_URL_REQUEST_TYPE_CONVERTERS_H_
+#define MOJO_SERVICES_HTML_VIEWER_BLINK_URL_REQUEST_TYPE_CONVERTERS_H_
+
+#include "mojo/services/public/interfaces/network/url_loader.mojom.h"
+
+namespace blink {
+class WebURLRequest;
+}
+
+namespace mojo {
+
+template<>
+class TypeConverter<URLRequestPtr, blink::WebURLRequest> {
+ public:
+  static URLRequestPtr ConvertFrom(const blink::WebURLRequest& request);
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_HTML_VIEWER_BLINK_URL_REQUEST_TYPE_CONVERTERS_H_