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

chrome/browser/extensions/webstore_inline_installer.cc

Index: chrome/browser/extensions/webstore_inline_installer.cc
diff --git a/chrome/browser/extensions/webstore_inline_installer.cc b/chrome/browser/extensions/webstore_inline_installer.cc
index 6e09305887ed6996c920372c35fc19e1b5ca9e9e..f7e869893a3311d83c530e189ce752cdd673376c 100644
--- a/chrome/browser/extensions/webstore_inline_installer.cc
+++ b/chrome/browser/extensions/webstore_inline_installer.cc
@@ -101,11 +101,11 @@ class SafeWebstoreResponseParser : public UtilityProcessHostClient {
 
   void OnJSONParseSucceeded(const ListValue& wrapper) {
     CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-    Value* value = NULL;
+    const Value* value = NULL;
     CHECK(wrapper.Get(0, &value));
     if (value->IsType(Value::TYPE_DICTIONARY)) {
       parsed_webstore_data_.reset(
-          static_cast<DictionaryValue*>(value)->DeepCopy());
+          static_cast<const DictionaryValue*>(value)->DeepCopy());
     } else {
       error_ = kInvalidWebstoreResponseError;
     }