Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/extension_font_settings_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.
 
 // Font Settings Extension API implementation.
 
 #include "chrome/browser/extensions/extension_font_settings_api.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 275 matching lines @@
   const bool kIncognito = false;
   std::string level_of_control =
       extension_preference_helpers::GetLevelOfControl(profile_,
                                                       extension_id(),
                                                       pref_path,
                                                       kIncognito);
 
   DictionaryValue* result = new DictionaryValue();
   result->SetString(kFontNameKey, font_name);
   result->SetString(kLevelOfControlKey, level_of_control);
-  result_.reset(result);
+  SetSingleResult(result);
   return true;
 }
 
 bool SetFontFunction::RunImpl() {
   if (profile_->IsOffTheRecord()) {
     error_ = kSetFromIncognitoError;
     return false;
   }
 
   scoped_ptr<fonts::SetFont::Params> params(
@@ skipping 46 matching lines @@
       NOTREACHED();
       return false;
     }
 
     DictionaryValue* font_name = new DictionaryValue();
     font_name->Set(kFontNameKey, Value::CreateStringValue(name));
     font_name->Set(kLocalizedNameKey, Value::CreateStringValue(localized_name));
     result->Append(font_name);
   }
 
-  result_.reset(result.release());
+  SetSingleResult(result.release());
   return true;
 }
 
 bool ClearFontPrefExtensionFunction::RunImpl() {
   if (profile_->IsOffTheRecord()) {
     error_ = kSetFromIncognitoError;
     return false;
   }
 
   ExtensionPrefs* prefs = profile_->GetExtensionService()->extension_prefs();
@@ skipping 14 matching lines @@
 
   std::string level_of_control =
       extension_preference_helpers::GetLevelOfControl(profile_,
                                                       extension_id(),
                                                       GetPrefName(),
                                                       kIncognito);
 
   DictionaryValue* result = new DictionaryValue();
   result->Set(GetKey(), pref->GetValue()->DeepCopy());
   result->SetString(kLevelOfControlKey, level_of_control);
-  result_.reset(result);
+  SetSingleResult(result);
   return true;
 }
 
 bool SetFontPrefExtensionFunction::RunImpl() {
   if (profile_->IsOffTheRecord()) {
     error_ = kSetFromIncognitoError;
     return false;
   }
 
   DictionaryValue* details = NULL;
@@ skipping 62 matching lines @@
   return kPixelSizeKey;
 }
 
 const char* SetMinimumFontSizeFunction::GetPrefName() {
   return prefs::kWebKitMinimumFontSize;
 }
 
 const char* SetMinimumFontSizeFunction::GetKey() {
   return kPixelSizeKey;
 }