Reduce string copies in GURL creation

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 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/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 243 matching lines @@
   DoLoad(load_type, url, cors_mode);
 }
 
 void WebMediaPlayerImpl::DoLoad(LoadType load_type,
                                 const blink::WebURL& url,
                                 CORSMode cors_mode) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   GURL gurl(url);
-  ReportMetrics(load_type, gurl,
-                GURL(frame_->document().securityOrigin().toString()));
+  ReportMetrics(
+      load_type, gurl,
+      GURL(base::string16(frame_->document().securityOrigin().toString())));
 
   // Set subresource URL for crash reporting.
   base::debug::SetCrashKeyValue("subresource_url", gurl.spec());
 
   load_type_ = load_type;
 
   SetNetworkState(WebMediaPlayer::NetworkStateLoading);
   SetReadyState(WebMediaPlayer::ReadyStateHaveNothing);
   media_log_->AddEvent(media_log_->CreateLoadEvent(url.string().utf8()));
 
@@ skipping 1097 matching lines @@
            << ", Video: " << stats.video_memory_usage << ", DataSource: "
            << (data_source_ ? data_source_->GetMemoryUsage() : 0)
            << ", Demuxer: " << demuxer_memory_usage;
 
   const int64_t delta = current_memory_usage - last_reported_memory_usage_;
   last_reported_memory_usage_ = current_memory_usage;
   adjust_allocated_memory_cb_.Run(delta);
 }
 
 }  // namespace media