[Mac] User manager should show up as a standalone window.

chrome/test/base/testing_profile_manager.h

Index: chrome/test/base/testing_profile_manager.h
diff --git a/chrome/test/base/testing_profile_manager.h b/chrome/test/base/testing_profile_manager.h
index c2af62af42846784badc35207f95d21fcb57e71a..5a0dd28b8854dabbc6fd26f5b32e8b9ceb7e2f25 100644
--- a/chrome/test/base/testing_profile_manager.h
+++ b/chrome/test/base/testing_profile_manager.h
@@ -60,9 +60,19 @@ class TestingProfileManager {
   // Small helper for creating testing profiles. Just forwards to above.
   TestingProfile* CreateTestingProfile(const std::string& name);
 
+  // Creates a new guest TestingProfile whose data lives in the guest profile
+  // test environment directory, as specified by the profile manager.
+  // This profile will not be added to the ProfileInfoCache. This will
+  // register the TestingProfile with the profile subsystem as well.
+  // The subsystem owns the Profile and returns a weak pointer.
+  TestingProfile* CreateGuestProfile();
+
   // Deletes a TestingProfile from the profile subsystem.
   void DeleteTestingProfile(const std::string& profile_name);
 
+  // Deletes a guest TestingProfile from the profile manager.
+  void DeleteGuestProfile();
+
   // Deletes the cache instance. This is useful for testing that the cache is
   // properly persisting data.
   void DeleteProfileInfoCache();