Correct const accessors in base/values.(h|cc), Part II (ListValue)

chrome/browser/extensions/webstore_install_helper.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/webstore_install_helper.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/values.h"
@@ skipping 134 matching lines @@
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   icon_decode_complete_ = true;
   error_ = kImageDecodeError;
   parse_error_ = Delegate::ICON_ERROR;
   ReportResultsIfComplete();
 }
 
 void WebstoreInstallHelper::OnJSONParseSucceeded(const ListValue& wrapper) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   manifest_parse_complete_ = true;
-  Value* value = NULL;
+  const Value* value = NULL;
   CHECK(wrapper.Get(0, &value));
   if (value->IsType(Value::TYPE_DICTIONARY)) {
     parsed_manifest_.reset(
-        static_cast<DictionaryValue*>(value)->DeepCopy());
+        static_cast<const DictionaryValue*>(value)->DeepCopy());
   } else {
     parse_error_ = Delegate::MANIFEST_ERROR;
   }
   ReportResultsIfComplete();
 }
 
 void WebstoreInstallHelper::OnJSONParseFailed(
     const std::string& error_message) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   manifest_parse_complete_ = true;
@@ skipping 22 matching lines @@
 
 void WebstoreInstallHelper::ReportResultFromUIThread() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (error_.empty() && parsed_manifest_.get())
     delegate_->OnWebstoreParseSuccess(id_, icon_, parsed_manifest_.release());
   else
     delegate_->OnWebstoreParseFailure(id_, parse_error_, error_);
 }
 
 }  // namespace extensions