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 4f8187ef044ffb62faa76e2c42726f3c1aa69211..895202fec6fd5c7855f141256286755f965e2036 100644
--- a/chrome/utility/chrome_content_utility_client.h
+++ b/chrome/utility/chrome_content_utility_client.h
@@ -40,6 +40,13 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
 
   static void PreSandboxStartup();
 
+  // Adds a message handler to the utility client.  This will take ownership of
+  // the handler.
+  void AddHandler(UtilityMessageHandler* handler);
+
+  // Adds a message type to the whitelist.
+  void AddWhitelistMessageType(int message_type);
+
  private:
   // IPC message handlers.
   void OnUnpackExtension(const base::FilePath& extension_path,
@@ -106,6 +113,11 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
   typedef ScopedVector<UtilityMessageHandler> Handlers;
   Handlers handlers_;
 
+  // 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);
 };