Remove use of deprecated base::ListValue::Append(Value*) overload in extensions.

chrome/browser/extensions/api/debugger/debugger_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.
 
 // Implements the Chrome Extensions Debugger API.
 
 #include "chrome/browser/extensions/api/debugger/debugger_api.h"
 
 #include <stddef.h>
 
@@ skipping 659 matching lines @@
 const char kTargetIdField[] = "id";
 const char kTargetTypeField[] = "type";
 const char kTargetTitleField[] = "title";
 const char kTargetAttachedField[] = "attached";
 const char kTargetUrlField[] = "url";
 const char kTargetFaviconUrlField[] = "faviconUrl";
 const char kTargetTabIdField[] = "tabId";
 const char kTargetExtensionIdField[] = "extensionId";
 const char kTargetTypeWorker[] = "worker";
 
-base::Value* SerializeTarget(scoped_refptr<DevToolsAgentHost> host) {
-  base::DictionaryValue* dictionary = new base::DictionaryValue();
+std::unique_ptr<base::DictionaryValue> SerializeTarget(
+    scoped_refptr<DevToolsAgentHost> host) {
+  std::unique_ptr<base::DictionaryValue> dictionary(
+      new base::DictionaryValue());
   dictionary->SetString(kTargetIdField, host->GetId());
   dictionary->SetString(kTargetTitleField, host->GetTitle());
   dictionary->SetBoolean(kTargetAttachedField, host->IsAttached());
   dictionary->SetString(kTargetUrlField, host->GetURL().spec());
 
   std::string type = host->GetType();
   if (type == DevToolsAgentHost::kTypePage) {
     int tab_id =
         extensions::ExtensionTabUtil::GetTabId(host->GetWebContents());
     dictionary->SetInteger(kTargetTabIdField, tab_id);
@@ skipping 35 matching lines @@
 void DebuggerGetTargetsFunction::SendTargetList(
     const content::DevToolsAgentHost::List& target_list) {
   std::unique_ptr<base::ListValue> result(new base::ListValue());
   for (size_t i = 0; i < target_list.size(); ++i)
     result->Append(SerializeTarget(target_list[i]));
   SetResult(std::move(result));
   SendResponse(true);
 }
 
 }  // namespace extensions