Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/api/idltest/idltest_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/idltest/idltest_api.h"
 
 #include "base/values.h"
 
 using base::BinaryValue;
 
 namespace {
 
 ListValue* CopyBinaryValueToIntegerList(const BinaryValue* input) {
   ListValue* output = new ListValue();
   const char* input_buffer = input->GetBuffer();
   for (size_t i = 0; i < input->GetSize(); i++) {
     output->Append(Value::CreateIntegerValue(input_buffer[i]));
   }
   return output;
 }
 
 }
 
 bool IdltestSendArrayBufferFunction::RunImpl() {
   BinaryValue* input = NULL;
   EXTENSION_FUNCTION_VALIDATE(args_ != NULL && args_->GetBinary(0, &input));
-  result_.reset(CopyBinaryValueToIntegerList(input));
+  SetResult(CopyBinaryValueToIntegerList(input));
   return true;
 }
 
 bool IdltestSendArrayBufferViewFunction::RunImpl() {
   BinaryValue* input = NULL;
   EXTENSION_FUNCTION_VALIDATE(args_ != NULL && args_->GetBinary(0, &input));
-  result_.reset(CopyBinaryValueToIntegerList(input));
+  SetResult(CopyBinaryValueToIntegerList(input));
   return true;
 }
 
 bool IdltestGetArrayBufferFunction::RunImpl() {
   std::string hello = "hello world";
   BinaryValue* output =
       BinaryValue::CreateWithCopiedBuffer(hello.c_str(), hello.size());
-  result_.reset(output);
+  SetResult(output);
   return true;
 }