Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc

 // Copyright (c) 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 "chrome/browser/extensions/api/identity/gaia_web_auth_flow.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 213 matching lines @@
   const char kRedirectPrefix[] = "Loading ";
   std::string prefix(kRedirectPrefix);
 
   if (base::StartsWith(title, prefix, base::CompareCase::SENSITIVE)) {
     GURL url(title.substr(prefix.length(), std::string::npos));
     if (url.is_valid())
       OnAuthFlowURLChange(url);
   }
 }
 
-scoped_ptr<WebAuthFlow> GaiaWebAuthFlow::CreateWebAuthFlow(GURL url) {
-  return scoped_ptr<WebAuthFlow>(new WebAuthFlow(this,
-                                                 profile_,
-                                                 url,
-                                                 WebAuthFlow::INTERACTIVE));
+std::unique_ptr<WebAuthFlow> GaiaWebAuthFlow::CreateWebAuthFlow(GURL url) {
+  return std::unique_ptr<WebAuthFlow>(
+      new WebAuthFlow(this, profile_, url, WebAuthFlow::INTERACTIVE));
 }
 
 }  // namespace extensions