Reduce string copies in GURL creation

media/blink/key_system_config_selector.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/key_system_config_selector.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 747 matching lines @@
         continue;
       case CONFIGURATION_REQUIRES_PERMISSION:
         if (request->was_permission_requested) {
           DVLOG(2) << "Rejecting requested configuration because "
                    << "permission was denied.";
           continue;
         }
         {
           // Note: the GURL must not be constructed inline because
           // base::Passed(&request) sets |request| to null.
-          GURL security_origin(request->security_origin.toString());
+          GURL security_origin(
+              base::string16(request->security_origin.toString()));
           media_permission_->RequestPermission(
               MediaPermission::PROTECTED_MEDIA_IDENTIFIER, security_origin,
               base::Bind(&KeySystemConfigSelector::OnPermissionResult,
                          weak_factory_.GetWeakPtr(), base::Passed(&request)));
         }
         return;
       case CONFIGURATION_SUPPORTED:
         cdm_config.allow_distinctive_identifier =
             (accumulated_configuration.distinctiveIdentifier ==
              blink::WebMediaKeySystemConfiguration::Requirement::Required);
@@ skipping 15 matching lines @@
 
 void KeySystemConfigSelector::OnPermissionResult(
     scoped_ptr<SelectionRequest> request,
     bool is_permission_granted) {
   request->was_permission_requested = true;
   request->is_permission_granted = is_permission_granted;
   SelectConfigInternal(std::move(request));
 }
 
 }  // namespace media