(2nd try) Add a helper class that keeps per-profile information for FileSystem API

chrome/browser/profile.h

 // Copyright (c) 2010 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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILE_H_
 #define CHROME_BROWSER_PROFILE_H_
 #pragma once
 
@@ skipping 33 matching lines @@
 class ChromeURLRequestContextGetter;
 class DesktopNotificationService;
 class DownloadManager;
 class Extension;
 class ExtensionDevToolsManager;
 class ExtensionProcessManager;
 class ExtensionMessageService;
 class ExtensionsService;
 class FaviconService;
 class FilePath;
+class FileSystemHostContext;
 class FindBarState;
 class GeolocationContentSettingsMap;
 class GeolocationPermissionContext;
 class HistoryService;
 class HostContentSettingsMap;
 class HostZoomMap;
 class NavigationController;
 class NTPResourceCache;
 class PasswordStore;
 class PersonalDataManager;
@@ skipping 206 matching lines @@
   // profile.
   virtual TemplateURLFetcher* GetTemplateURLFetcher() = 0;
 
   // Returns the DownloadManager associated with this profile.
   virtual DownloadManager* GetDownloadManager() = 0;
   virtual bool HasCreatedDownloadManager() const = 0;
 
   // Returns the PersonalDataManager associated with this profile.
   virtual PersonalDataManager* GetPersonalDataManager() = 0;
 
+  // Returns the HTML5 FileSystemHostContext assigned to this profile.
+  virtual FileSystemHostContext* GetFileSystemHostContext() = 0;
+
   // Init our themes system.
   virtual void InitThemes() = 0;
 
   // Set the theme to the specified extension.
   virtual void SetTheme(Extension* extension) = 0;
 
   // Set the theme to the machine's native theme.
   virtual void SetNativeTheme() = 0;
 
   // Clear the theme and reset it to default.
@@ skipping 195 matching lines @@
   bool restored_last_session_;
 
   // Accessibility events will only be propagated when the pause
   // level is zero.  PauseAccessibilityEvents and ResumeAccessibilityEvents
   // increment and decrement the level, respectively, rather than set it to
   // true or false, so that calls can be nested.
   int accessibility_pause_level_;
 };
 
 #endif  // CHROME_BROWSER_PROFILE_H_