Disable background network access in sync integration tests

chrome/test/live_sync/live_sync_test.h

 // Copyright (c) 2011 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_TEST_LIVE_SYNC_LIVE_SYNC_TEST_H_
 #define CHROME_TEST_LIVE_SYNC_LIVE_SYNC_TEST_H_
 #pragma once
 
 #include "chrome/test/in_process_browser_test.h"
 
@@ skipping 49 matching lines @@
 
   virtual ~LiveSyncTest() {}
 
   // Validates command line parameters and creates a local python test server if
   // specified.
   virtual void SetUp();
 
   // Brings down local python test server if one was created.
   virtual void TearDown();
 
-  // Appends command line flag to enable sync.
-  virtual void SetUpCommandLine(CommandLine* command_line) {}
+  // Sets up command line flags required for sync tests.
+  virtual void SetUpCommandLine(CommandLine* cl);
 
   // Used to get the number of sync clients used by a test.
   int num_clients() WARN_UNUSED_RESULT { return num_clients_; }
 
   // Returns a pointer to a particular sync profile. Callee owns the object
   // and manages its lifetime.
   Profile* GetProfile(int index) WARN_UNUSED_RESULT;
 
   // Returns a pointer to a particular sync client. Callee owns the object
   // and manages its lifetime.
@@ skipping 131 matching lines @@
   // Used to start and stop the local test server.
   base::ProcessHandle test_server_handle_;
 
   // Fake URLFetcher factory used to mock out GAIA signin.
   scoped_ptr<FakeURLFetcherFactory> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveSyncTest);
 };
 
 #endif  // CHROME_TEST_LIVE_SYNC_LIVE_SYNC_TEST_H_