Reduce string copies in GURL creation

media/blink/encrypted_media_player_support.cc

 // 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.
 
 #include "media/blink/encrypted_media_player_support.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 153 matching lines @@
 
   if (!proxy_decryptor_) {
     DCHECK(current_key_system_.empty());
     DCHECK(!cdm_context_ready_cb_.is_null());
     proxy_decryptor_.reset(new ProxyDecryptor(
         media_permission_, use_hw_secure_codecs,
         BIND_TO_RENDER_LOOP(&EncryptedMediaPlayerSupport::OnKeyAdded),
         BIND_TO_RENDER_LOOP(&EncryptedMediaPlayerSupport::OnKeyError),
         BIND_TO_RENDER_LOOP(&EncryptedMediaPlayerSupport::OnKeyMessage)));
 
-    GURL security_origin(frame->document().securityOrigin().toString());
+    GURL security_origin(
+        base::string16(frame->document().securityOrigin().toString()));
     proxy_decryptor_->CreateCdm(cdm_factory_, key_system, security_origin,
                                 cdm_context_ready_cb_);
     current_key_system_ = key_system;
   }
 
   // We do not support run-time switching between key systems for now.
   DCHECK(!current_key_system_.empty());
   if (key_system != current_key_system_)
     return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
 
@@ skipping 135 matching lines @@
 
   client_->keyMessage(
       WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
       WebString::fromUTF8(session_id),
       message.empty() ? NULL : &message[0],
       base::saturated_cast<unsigned int>(message.size()),
       destination_url);
 }
 
 }  // namespace media