Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/api/downloads/downloads_api.cc

 // Copyright (c) 2012 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/downloads/downloads_api.h"
 
 #include <algorithm>
 #include <cctype>
 #include <iterator>
 #include <set>
@@ skipping 526 matching lines @@
         BrowserThread::UI, FROM_HERE,
         base::Bind(&DownloadsDownloadFunction::OnStarted, this,
                    DownloadId::Invalid(), error));
   }
 }
 
 void DownloadsDownloadFunction::OnStarted(DownloadId dl_id, net::Error error) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   VLOG(1) << __FUNCTION__ << " " << dl_id << " " << error;
   if (dl_id.local() >= 0) {
-    result_.reset(base::Value::CreateIntegerValue(dl_id.local()));
+    SetSingleResult(base::Value::CreateIntegerValue(dl_id.local()));
   } else {
     error_ = net::ErrorToString(error);
   }
   SendResponse(error_.empty());
 }
 
 DownloadsSearchFunction::DownloadsSearchFunction()
   : SyncDownloadsFunction(DOWNLOADS_FUNCTION_SEARCH),
     query_(new DownloadQuery()),
     get_id_(0),
@@ skipping 112 matching lines @@
       incognito_manager->GetAllDownloads(
           FilePath(FILE_PATH_LITERAL("")), &all_items);
   }
   query_->Search(all_items.begin(), all_items.end(), &cpp_results);
   base::ListValue* json_results = new base::ListValue();
   for (DownloadManager::DownloadVector::const_iterator it = cpp_results.begin();
        it != cpp_results.end(); ++it) {
     scoped_ptr<base::DictionaryValue> item(DownloadItemToJSON(*it));
     json_results->Append(item.release());
   }
-  result_.reset(json_results);
+  SetSingleResult(json_results);
   return true;
 }
 
 DownloadsPauseFunction::DownloadsPauseFunction()
   : SyncDownloadsFunction(DOWNLOADS_FUNCTION_PAUSE),
     download_id_(DownloadId::Invalid().local()) {
 }
 
 DownloadsPauseFunction::~DownloadsPauseFunction() {}
 
@@ skipping 213 matching lines @@
       path_, IconLoaderSizeFromPixelSize(icon_size_),
       base::Bind(&DownloadsGetFileIconFunction::OnIconURLExtracted, this)));
   return true;
 }
 
 void DownloadsGetFileIconFunction::OnIconURLExtracted(const std::string& url) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (url.empty())
     error_ = download_extension_errors::kIconNotFoundError;
   else
-    result_.reset(base::Value::CreateStringValue(url));
+    SetSingleResult(base::Value::CreateStringValue(url));
   SendResponse(error_.empty());
 }
 
 ExtensionDownloadsEventRouter::ExtensionDownloadsEventRouter(
     Profile* profile,
     DownloadManager* manager)
   : profile_(profile),
     manager_(manager) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(profile_);
@@ skipping 169 matching lines @@
       extensions::EventFilteringInfo());
 
   DownloadsNotificationSource notification_source;
   notification_source.event_name = event_name;
   notification_source.profile = profile_;
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_DOWNLOADS_EVENT,
       content::Source<DownloadsNotificationSource>(&notification_source),
       content::Details<std::string>(&json_args));
 }