Revert 199625 "Remove ENABLE_MESSAGE_CENTER"

trunk/src/chrome/browser/browser_process.h

Index: trunk/src/chrome/browser/browser_process.h
===================================================================
--- trunk/src/chrome/browser/browser_process.h	(revision 199638)
+++ trunk/src/chrome/browser/browser_process.h	(working copy)
@@ -54,9 +54,11 @@
 class EventRouterForwarder;
 }
 
+#if defined(ENABLE_MESSAGE_CENTER)
 namespace message_center {
 class MessageCenter;
 }
+#endif
 
 namespace net {
 class URLRequestContextGetter;
@@ -112,8 +114,10 @@
   // Returns the manager for desktop notifications.
   virtual NotificationUIManager* notification_ui_manager() = 0;
 
+#if defined(ENABLE_MESSAGE_CENTER)
   // MessageCenter is a global list of currently displayed notifications.
   virtual message_center::MessageCenter* message_center() = 0;
+#endif
 
   // Returns the state object for the thread that we perform I/O
   // coordination on (network requests, communication with renderers,