Do not load extension system in the Profile import process.

chrome/browser/first_run/first_run.h

Index: chrome/browser/first_run/first_run.h
diff --git a/chrome/browser/first_run/first_run.h b/chrome/browser/first_run/first_run.h
index 4121730cd14a86fedad2f794bb39b47f77f54554..983d996753b6971137da823fc9e81e66cad1d7e1 100644
--- a/chrome/browser/first_run/first_run.h
+++ b/chrome/browser/first_run/first_run.h
@@ -97,6 +97,12 @@ bool SetPersonalDataManagerFirstRunPref();
 // Log a metric for the "FirstRun.SearchEngineBubble" histogram.
 void LogFirstRunMetric(FirstRunBubbleMetric metric);
 
+// Allow a test to specify additional arguments for the profile import process.
+void SetExtraArgumentsForImportProcess(const CommandLine& arguments);
+
+// Get any extra arguments set with SetExtraArgumentsForImportProcess.
+const CommandLine& GetExtraArgumentsForImportProcess();
+
 // -- Platform-specific functions --
 
 // Automatically import history and home page (and search engine, if