Launches a privileged utility process.

chrome/utility/chrome_content_utility_client.h

Index: chrome/utility/chrome_content_utility_client.h
diff --git a/chrome/utility/chrome_content_utility_client.h b/chrome/utility/chrome_content_utility_client.h
index 8b914f8119c5728691d7881a66eb892258745961..fcc5da9b8c8cf82e863f761d55a44ef4b3c188ed 100644
--- a/chrome/utility/chrome_content_utility_client.h
+++ b/chrome/utility/chrome_content_utility_client.h
@@ -129,6 +129,11 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
   scoped_ptr<metadata::MediaMetadataParser> media_metadata_parser_;
 #endif  // !defined(OS_ANDROID) && !defined(OS_IOS)
 
+  // Flag to enable whitelisting.
+  bool filter_messages_;
+  // A list of message_ids to filter.
+  std::set<int> message_id_whitelist_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeContentUtilityClient);
 };