Made return types of various Value::DeepCopy() implementations more specific

chrome/browser/extensions/extension_function.cc

 // Copyright (c) 2010 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/extension_function.h"
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 22 matching lines @@
 
 AsyncExtensionFunction::AsyncExtensionFunction()
     : args_(NULL), bad_message_(false) {
 }
 
 AsyncExtensionFunction::~AsyncExtensionFunction() {
 }
 
 void AsyncExtensionFunction::SetArgs(const ListValue* args) {
   DCHECK(!args_.get());  // Should only be called once.
-  args_.reset(static_cast<ListValue*>(args->DeepCopy()));
+  args_.reset(args->DeepCopy());
 }
 
 const std::string AsyncExtensionFunction::GetResult() {
   std::string json;
   // Some functions might not need to return any results.
   if (result_.get())
     base::JSONWriter::Write(result_.get(), false, &json);
   return json;
 }
 
@@ skipping 23 matching lines @@
 
 SyncExtensionFunction::SyncExtensionFunction() {
 }
 
 SyncExtensionFunction::~SyncExtensionFunction() {
 }
 
 void SyncExtensionFunction::Run() {
   SendResponse(RunImpl());
 }