Mark supervised profiles as such immediately when they're created.

chrome/browser/extensions/extension_service_unittest.h

Index: chrome/browser/extensions/extension_service_unittest.h
diff --git a/chrome/browser/extensions/extension_service_unittest.h b/chrome/browser/extensions/extension_service_unittest.h
index 05b71a0877f395073626ba2cd6be9cb8416098d9..3edac65b6096135b38f5490dc3f0fca36568b6f4 100644
--- a/chrome/browser/extensions/extension_service_unittest.h
+++ b/chrome/browser/extensions/extension_service_unittest.h
@@ -36,6 +36,7 @@ class ExtensionServiceTestBase : public testing::Test {
     base::FilePath extensions_install_dir;
     bool autoupdate_enabled;
     bool is_first_run;
+    bool profile_is_managed;
 
     ExtensionServiceInitParams();
   };
@@ -67,8 +68,7 @@ class ExtensionServiceTestBase : public testing::Test {
   }
 
  protected:
-  void InitializeExtensionServiceHelper(bool autoupdate_enabled,
-                                        bool is_first_run);
+  void InitializeExtensionServiceParams(ExtensionServiceInitParams* params);
 
   // Destroying at_exit_manager_ will delete all LazyInstances, so it must come
   // after thread_bundle_ in the destruction order.