Reduce string copies in GURL creation

content/public/child/url_conversion.cc

+// 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.
+
+#include "base/strings/string_piece.h"
+#include "third_party/WebKit/public/platform/WebString.h"
+#include "url/gurl.h"
+
+namespace content {
+
+GURL WebStringToGURL(const blink::WebString& web_string) {
+  if (web_string.is8Bit()) {
+    return GURL(base::StringPiece(
+        reinterpret_cast<const char*>(web_string.data8OrNull()),

[esprehn, 2016/01/08 02:12:50]

I'm not sure if this is right, the 8 bit data is not valid utf8, that's only
true when the string contains only ASCII I think. See StringUTF8Adaptor.

+        web_string.length()));
+  } else {
+    return GURL(base::StringPiece16(
+        static_cast<const base::char16*>(web_string.data16OrNull()),
+        web_string.length()));
+  }
+}
+
+}  // namespace content