Convert Pass()→std::move() in //chrome

chrome/browser/tracing/background_tracing_field_trial.cc

 // Copyright 2015 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 "chrome/browser/tracing/background_tracing_field_trial.h"
 
 #include <string>
+#include <utility>
 
 #include "base/json/json_reader.h"
 #include "base/metrics/field_trial.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/tracing/crash_service_uploader.h"
 #include "chrome/common/variations/variations_util.h"
 #include "components/variations/variations_associated_data.h"
 #include "content/public/browser/background_tracing_config.h"
 #include "content/public/browser/background_tracing_manager.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 22 matching lines @@
                     scoped_ptr<const base::DictionaryValue> metadata,
                     base::Closure callback) {
   TraceCrashServiceUploader* uploader = new TraceCrashServiceUploader(
       g_browser_process->system_request_context());
 
   if (GURL(upload_url).is_valid())
     uploader->SetUploadURL(upload_url);
 
   uploader->DoUpload(
       file_contents->data(), content::TraceUploader::UNCOMPRESSED_UPLOAD,
-      metadata.Pass(), content::TraceUploader::UploadProgressCallback(),
+      std::move(metadata), content::TraceUploader::UploadProgressCallback(),
       base::Bind(&OnUploadComplete, base::Owned(uploader), callback));
 }
 
 }  // namespace
 
 void SetConfigTextFilterForTesting(ConfigTextFilterForTesting predicate) {
   g_config_text_filter_for_testing = predicate;
 }
 
 void SetupBackgroundTracingFieldTrial() {
@@ skipping 15 matching lines @@
   const base::DictionaryValue* dict = nullptr;
   if (!value->GetAsDictionary(&dict))
     return;
 
   scoped_ptr<content::BackgroundTracingConfig> config =
       content::BackgroundTracingConfig::FromDict(dict);
   if (!config)
     return;
 
   content::BackgroundTracingManager::GetInstance()->SetActiveScenario(
-      config.Pass(), base::Bind(&UploadCallback, upload_url),
+      std::move(config), base::Bind(&UploadCallback, upload_url),
       content::BackgroundTracingManager::ANONYMIZE_DATA);
 }
 
 }  // namespace tracing