Do not load extension system in the Profile import process.

chrome/browser/first_run/first_run.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_FIRST_RUN_FIRST_RUN_H_
 #define CHROME_BROWSER_FIRST_RUN_FIRST_RUN_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 79 matching lines @@
 bool SetShowWelcomePagePref();
 
 // Sets the kAutofillPersonalDataManagerFirstRun local state pref so that the
 // browser loads PersonalDataManager once the main message loop gets going.
 // Returns false if the pref could not be set.
 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
 // ShouldShowSearchEngineDialog is true).
 void AutoImport(Profile* profile,
                 bool homepage_defined,
                 int import_items,
                 int dont_import_items,
                 bool make_chrome_default,
                 ProcessSingleton* process_singleton);
@@ skipping 42 matching lines @@
                        const content::NotificationDetails& details) OVERRIDE;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FirstRunBubbleLauncher);
 };
 
 }  // namespace first_run
 
 #endif  // CHROME_BROWSER_FIRST_RUN_FIRST_RUN_H_