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

chrome/browser/extensions/api/tabs/app_window_controller.cc

Index: chrome/browser/extensions/api/tabs/app_window_controller.cc
diff --git a/chrome/browser/extensions/api/tabs/app_window_controller.cc b/chrome/browser/extensions/api/tabs/app_window_controller.cc
index 38e717924b0f2ffa4184b6be37bc54370dd61d3e..6831e346d51ed7271de0274b8c4df91a5500a702 100644
--- a/chrome/browser/extensions/api/tabs/app_window_controller.cc
+++ b/chrome/browser/extensions/api/tabs/app_window_controller.cc
@@ -51,23 +51,18 @@ AppWindowController::CreateWindowValueWithTabs(
     const Extension* extension) const {
   std::unique_ptr<base::DictionaryValue> result = CreateWindowValue();
 
-  base::DictionaryValue* tab_value = CreateTabValue(extension, 0);
+  std::unique_ptr<base::DictionaryValue> tab_value =
+      CreateTabObject(extension, 0)->ToValue();
   if (!tab_value)
     return result;
 
   base::ListValue* tab_list = new base::ListValue();
-  tab_list->Append(tab_value);
+  tab_list->Append(std::move(tab_value));
   result->Set(tabs_constants::kTabsKey, tab_list);
 
   return result;
 }
 
-base::DictionaryValue* AppWindowController::CreateTabValue(
-    const Extension* extension,
-    int tab_index) const {
-  return CreateTabObject(extension, tab_index)->ToValue().release();
-}
-
 std::unique_ptr<api::tabs::Tab> AppWindowController::CreateTabObject(
     const extensions::Extension* extension,
     int tab_index) const {