Sanitize PrefStore interface.

chrome/test/testing_profile.h

Index: chrome/test/testing_profile.h
diff --git a/chrome/test/testing_profile.h b/chrome/test/testing_profile.h
index 3469c337fa5792f2787087473962ba3d2edbd305..7d60d1feea064b034936a77030c197704a94557d 100644
--- a/chrome/test/testing_profile.h
+++ b/chrome/test/testing_profile.h
@@ -25,6 +25,7 @@ class BookmarkModel;
 class BrowserThemeProvider;
 class CommandLine;
 class DesktopNotificationService;
+class ExtensionPrefStore;
 class ExtensionPrefs;
 class FaviconService;
 class FindBarState;
@@ -405,6 +406,9 @@ class TestingProfile : public Profile {
   FilePath last_selected_directory_;
   scoped_refptr<history::TopSites> top_sites_;  // For history and thumbnails.
 
+  // Extension pref store, created for use by |extension_prefs_|.
+  scoped_ptr<ExtensionPrefStore> extension_pref_store_;
+
   // The Extension Preferences. Only created if CreateExtensionsService is
   // invoked.
   scoped_ptr<ExtensionPrefs> extension_prefs_;