Fix sync test crashing when multiprofiles are enabled on Mac.

chrome/browser/profiles/profile_manager.h

Index: chrome/browser/profiles/profile_manager.h
===================================================================
--- chrome/browser/profiles/profile_manager.h	(revision 97284)
+++ chrome/browser/profiles/profile_manager.h	(working copy)
@@ -30,7 +30,7 @@
 class ProfileManagerObserver {
  public:
   enum Status {
-    // So epic.
+    // Profile creation has failed.
     STATUS_FAIL,
     // Profile created but before initializing extensions and promo resources.
     STATUS_CREATED,
@@ -167,13 +167,16 @@
   // Checks if multiple profiles is enabled.
   static bool IsMultipleProfilesEnabled();
 
+  // Register and add testing profile to the ProfileManager. Use ONLY in tests!
+  // This allows the creation of Profiles outside of the standard creation path
+  // for testing only. If |addToCache|, add to ProfileInfoCache as well.
+  void RegisterTestingProfile(Profile* profile, bool addToCache);
+
  protected:
   // Does final initial actions.
   virtual void DoFinalInit(Profile* profile, bool go_off_the_record);
 
  private:
-  friend class ExtensionEventRouterForwarderTest;
-
   // This struct contains information about profiles which are being loaded or
   // were loaded.
   struct ProfileInfo {