Reland of Stop passing raw pointers to base::Value API in c/b/ui

chrome/browser/ui/webui/options/language_options_handler.h

Index: chrome/browser/ui/webui/options/language_options_handler.h
diff --git a/chrome/browser/ui/webui/options/language_options_handler.h b/chrome/browser/ui/webui/options/language_options_handler.h
index 41725792ee0ec1bcd0bbc6b2b15f7ea3267ec678..93943cd67447bf8a8250a267e5866d2784ef7b6e 100644
--- a/chrome/browser/ui/webui/options/language_options_handler.h
+++ b/chrome/browser/ui/webui/options/language_options_handler.h
@@ -5,9 +5,15 @@
 #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "chrome/browser/ui/webui/options/language_options_handler_common.h"
 
+namespace base {
+class ListValue;
+}
+
 namespace options {
 
 // Language options UI page handler for non-Chrome OS platforms.  For Chrome OS,
@@ -29,7 +35,7 @@ class LanguageOptionsHandler : public LanguageOptionsHandlerCommon {
   // The return value will look like:
   // [{'code': 'fi', 'displayName': 'Finnish', 'nativeDisplayName': 'suomi'},
   //  ...]
-  static base::ListValue* GetLanguageList();
+  static std::unique_ptr<base::ListValue> GetLanguageList();
 
  private:
   // LanguageOptionsHandlerCommon implementation.