Linux: delete the unencrypted login database file after a successful password migration.

chrome/browser/password_manager/password_store_default.h

Index: chrome/browser/password_manager/password_store_default.h
===================================================================
--- chrome/browser/password_manager/password_store_default.h	(revision 51079)
+++ chrome/browser/password_manager/password_store_default.h	(working copy)
@@ -50,6 +50,11 @@
   void OnWebDataServiceRequestDone(WebDataService::Handle handle,
                                    const WDTypedResult *result);
 
+ protected:
+  inline bool DeleteAndRecreateDatabaseFile() {
+    return login_db_->DeleteAndRecreateDatabaseFile();
+  }
+
  private:
   // Migrates logins from the WDS to the LoginDatabase.
   void MigrateIfNecessary();