Reduce string copies in GURL creation

content/public/child/url_conversion.h

+// Copyright 2016 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_PUBLIC_CHILD_URL_CONVERSION_H_
+#define CONTENT_PUBLIC_CHILD_URL_CONVERSION_H_
+
+#include "content/common/content_export.h"
+
+class GURL;
+
+namespace blink {
+class WebString;
+}
+
+namespace content {
+
+// Gets the contents of a WebString and interprets it as a GURL. This is better
+// than getting a string out of WebString and passing it to GURL's constructor
+// because it handles the dual 8/16 bit nature of WebString without
+// intermediate copies.
+CONTENT_EXPORT GURL WebStringToGURL(const blink::WebString& web_string);

[esprehn, 2016/01/13 02:02:31]

I sort of wonder if this shouldn't be in blink platform instead, it doesn't
really feel like it belongs here.

If this was just in blink platform we also wouldn't need WebStringUTF8Adaptor at
all. We probably _should_ have it, for other places in the codebase, but you
wouldn't need it for this usage.

+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_CHILD_URL_CONVERSION_H_