Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/api/extension_action/extension_actions_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/extension_action/extension_actions_api.h"
 
 #include <string>
 
 #include "base/string_number_conversions.h"
 #include "base/string_piece.h"
@@ skipping 263 matching lines @@
     if (!ParseCSSColorString(color_string, &color))
       return false;
   }
 
   extension_action_->SetBadgeBackgroundColor(tab_id_, color);
   NotifyChange();
   return true;
 }
 
 bool ExtensionActionGetTitleFunction::RunExtensionAction() {
-  result_.reset(Value::CreateStringValue(extension_action_->GetTitle(tab_id_)));
+  SetSingleResult(
+      Value::CreateStringValue(extension_action_->GetTitle(tab_id_)));
   return true;
 }
 
 bool ExtensionActionGetPopupFunction::RunExtensionAction() {
-  result_.reset(Value::CreateStringValue(
-                    extension_action_->GetPopupUrl(tab_id_).spec()));
+  SetSingleResult(
+      Value::CreateStringValue(extension_action_->GetPopupUrl(tab_id_).spec()));
   return true;
 }
 
 bool ExtensionActionGetBadgeTextFunction::RunExtensionAction() {
-  result_.reset(Value::CreateStringValue(
-                    extension_action_->GetBadgeText(tab_id_)));
+  SetSingleResult(
+      Value::CreateStringValue(extension_action_->GetBadgeText(tab_id_)));
   return true;
 }
 
 bool ExtensionActionGetBadgeBackgroundColorFunction::RunExtensionAction() {
   ListValue* list = new ListValue();
   SkColor color = extension_action_->GetBadgeBackgroundColor(tab_id_);
   list->Append(Value::CreateIntegerValue(SkColorGetR(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetG(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetB(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetA(color)));
-  result_.reset(list);
+  SetSingleResult(list);
   return true;
 }