Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

chrome/browser/ui/webui/options/certificate_manager_handler.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/ui/webui/options/certificate_manager_handler.h"
 
 #include <errno.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <algorithm>
@@ skipping 69 matching lines @@
 
   *result = string_value[0] == 't';
   return true;
 }
 
 struct DictionaryIdComparator {
   explicit DictionaryIdComparator(icu::Collator* collator)
       : collator_(collator) {
   }
 
-  bool operator()(const base::Value* a,
-                  const base::Value* b) const {
-    DCHECK(a->GetType() == base::Value::TYPE_DICTIONARY);
-    DCHECK(b->GetType() == base::Value::TYPE_DICTIONARY);
-    const base::DictionaryValue* a_dict =
-        reinterpret_cast<const base::DictionaryValue*>(a);
-    const base::DictionaryValue* b_dict =
-        reinterpret_cast<const base::DictionaryValue*>(b);
+  bool operator()(const std::unique_ptr<base::Value>& a,
+                  const std::unique_ptr<base::Value>& b) const {
+    const base::DictionaryValue* a_dict;
+    bool a_is_dictionary = a->GetAsDictionary(&a_dict);
+    DCHECK(a_is_dictionary);
+    const base::DictionaryValue* b_dict;
+    bool b_is_dictionary = b->GetAsDictionary(&b_dict);
+    DCHECK(b_is_dictionary);
     base::string16 a_str;
     base::string16 b_str;
     a_dict->GetString(kNameId, &a_str);
     b_dict->GetString(kNameId, &b_str);
     if (collator_ == NULL)
       return a_str < b_str;
     return base::i18n::CompareString16WithCollator(*collator_, a_str, b_str) ==
            UCOL_LESS;
   }
 
@@ skipping 1118 matching lines @@
                                    title_value,
                                    error_value,
                                    cert_error_list);
 }
 
 gfx::NativeWindow CertificateManagerHandler::GetParentWindow() const {
   return web_ui()->GetWebContents()->GetTopLevelNativeWindow();
 }
 
 }  // namespace options