Reduce string copies in GURL creation

third_party/WebKit/public/platform/URLConversion.h

Index: third_party/WebKit/public/platform/URLConversion.h
diff --git a/third_party/WebKit/public/platform/URLConversion.h b/third_party/WebKit/public/platform/URLConversion.h
new file mode 100644
index 0000000000000000000000000000000000000000..599e2796d203e5b5a44f6892787137833cfa4f91
--- /dev/null
+++ b/third_party/WebKit/public/platform/URLConversion.h
@@ -0,0 +1,20 @@
+// 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 URLConversion_h
+#define URLConversion_h
+
+#include "WebCommon.h"
+
+class GURL;
+
+namespace blink {
+
+class WebString;
+
+BLINK_COMMON_EXPORT GURL WebStringToGURL(const WebString&);
+
+} // namespace blink
+
+#endif