Fix sync test crashing when multiprofiles are enabled on Mac.

chrome/browser/extensions/extension_event_router_forwarder_unittest.cc

Index: chrome/browser/extensions/extension_event_router_forwarder_unittest.cc
===================================================================
--- chrome/browser/extensions/extension_event_router_forwarder_unittest.cc	(revision 97284)
+++ chrome/browser/extensions/extension_event_router_forwarder_unittest.cc	(working copy)
@@ -56,8 +56,10 @@
     profile1_ = new TestingProfile();
     profile2_ = new TestingProfile();
 
-    browser_process->profile_manager()->RegisterProfile(profile1_, true);
-    browser_process->profile_manager()->RegisterProfile(profile2_, true);
+    browser_process->profile_manager()->RegisterTestingProfile(profile1_,
+                                                               false);
+    browser_process->profile_manager()->RegisterTestingProfile(profile2_,
+                                                               false);
   }
 
   TestingProfile* CreateIncognitoProfile(TestingProfile* base) {