Move browsing_data_helper files into a separate directory.

chrome/browser/browsing_data_helper.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.
-
-// Defines methods relevant to all code that wants to work with browsing data.
-
-#ifndef CHROME_BROWSER_BROWSING_DATA_HELPER_H_
-#define CHROME_BROWSER_BROWSING_DATA_HELPER_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-
-namespace WebKit {
-class WebString;
-}
-
-class ExtensionSpecialStoragePolicy;
-class GURL;
-
-class BrowsingDataHelper {
- public:
-  enum OriginSetMask {
-    UNPROTECTED_WEB = 1 << 0,  // drive-by web.
-    PROTECTED_WEB = 1 << 1,    // hosted applications.
-    EXTENSION = 1 << 2,        // chrome-extension://*
-    // Always add new items to the enum above ALL and add them to ALL.
-    ALL = UNPROTECTED_WEB | PROTECTED_WEB | EXTENSION,
-  };
-
-  // Returns true iff the provided scheme is (really) web safe, and suitable
-  // for treatment as "browsing data". This relies on the definition of web safe
-  // in ChildProcessSecurityPolicy, but excluding schemes like
-  // `chrome-extension`.
-  static bool IsWebScheme(const std::string& scheme);
-  static bool IsWebScheme(const WebKit::WebString& scheme);
-  static bool HasWebScheme(const GURL& origin);
-
-  // Returns true iff the provided scheme is an extension.
-  static bool IsExtensionScheme(const std::string& scheme);
-  static bool IsExtensionScheme(const WebKit::WebString& scheme);
-  static bool HasExtensionScheme(const GURL& origin);
-
-  // Returns true if the provided origin matches the provided mask.
-  static bool DoesOriginMatchMask(const GURL& origin,
-                                  int origin_set_mask,
-                                  ExtensionSpecialStoragePolicy* policy);
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(BrowsingDataHelper);
-};
-
-#endif  // CHROME_BROWSER_BROWSING_DATA_HELPER_H_