Move browsing_data_helper files into a separate directory.

chrome/browser/browsing_data_helper_browsertest.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.
-
-// Contains code shared by all browsing data browsertests.
-
-#ifndef CHROME_BROWSER_BROWSING_DATA_HELPER_BROWSERTEST_H_
-#define CHROME_BROWSER_BROWSING_DATA_HELPER_BROWSERTEST_H_
-
-#include <list>
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-#include "base/message_loop.h"
-
-// This template can be used for the StartFetching methods of the browsing data
-// helper classes. It is supposed to be instantiated with the respective
-// browsing data info type.
-template <typename T>
-class BrowsingDataHelperCallback {
- public:
-  BrowsingDataHelperCallback()
-      : has_result_(false) {
-  }
-
-  const std::list<T>& result() {
-    MessageLoop::current()->Run();
-    DCHECK(has_result_);
-    return result_;
-  }
-
-  void callback(const std::list<T>& info) {
-    result_ = info;
-    has_result_ = true;
-    MessageLoop::current()->Quit();
-  }
-
- private:
-  bool has_result_;
-  std::list<T> result_;
-
-  DISALLOW_COPY_AND_ASSIGN(BrowsingDataHelperCallback);
-};
-
-#endif  // CHROME_BROWSER_BROWSING_DATA_HELPER_BROWSERTEST_H_