Added support for multiple parameters to Extension API callbacks.

chrome/browser/history/history_extension_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/history/history_extension_api.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/json/json_writer.h"
@@ skipping 247 matching lines @@
     const history::URLRow* url_row,
     history::VisitVector* visits) {
   ListValue* list = new ListValue();
   if (visits && !visits->empty()) {
     for (history::VisitVector::iterator iterator = visits->begin();
          iterator != visits->end();
          ++iterator) {
       AddVisitNode(*iterator, list);
     }
   }
-  result_.reset(list);
+  SetResult(list);
   SendAsyncResponse();
 }
 
 bool SearchHistoryFunction::RunAsyncImpl() {
   DictionaryValue* json;
   EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &json));
 
   // Initialize the HistoryQuery
   string16 search_text;
   EXTENSION_FUNCTION_VALIDATE(json->GetString(kTextKey, &search_text));
@@ skipping 32 matching lines @@
     history::QueryResults* results) {
   ListValue* list = new ListValue();
   if (results && !results->empty()) {
     for (history::QueryResults::URLResultVector::const_iterator iterator =
             results->begin();
          iterator != results->end();
         ++iterator) {
       AddHistoryNode(**iterator, list);
     }
   }
-  result_.reset(list);
+  SetResult(list);
   SendAsyncResponse();
 }
 
 bool AddUrlHistoryFunction::RunImpl() {
   DictionaryValue* json;
   EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(0, &json));
 
   Value* value;
   EXTENSION_FUNCTION_VALIDATE(json->Get(kUrlKey, &value));
 
@@ skipping 74 matching lines @@
       &cancelable_consumer_,
       base::Bind(&DeleteAllHistoryFunction::DeleteComplete,
                  base::Unretained(this)));
 
   return true;
 }
 
 void DeleteAllHistoryFunction::DeleteComplete() {
   SendAsyncResponse();
 }