Change MessageService to use ProfileKeyedAPI.

chrome/browser/extensions/test_extension_system.cc

Index: chrome/browser/extensions/test_extension_system.cc
diff --git a/chrome/browser/extensions/test_extension_system.cc b/chrome/browser/extensions/test_extension_system.cc
index ad96e963e36920b7d1622b8fcedbd77ff2b14e74..3bfaa963393a33ecfe61af1d101b502af6eb8aaf 100644
--- a/chrome/browser/extensions/test_extension_system.cc
+++ b/chrome/browser/extensions/test_extension_system.cc
@@ -7,7 +7,6 @@
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/api/location/location_manager.h"
-#include "chrome/browser/extensions/api/messaging/message_service.h"
 #include "chrome/browser/extensions/blacklist.h"
 #include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_info_map.h"
@@ -151,10 +150,6 @@ TestExtensionSystem::lazy_background_task_queue() {
   return NULL;
 }
 
-MessageService* TestExtensionSystem::message_service() {
-  return NULL;
-}
-
 EventRouter* TestExtensionSystem::event_router() {
   return NULL;
 }