Make MountPointProvider pluggable from outside webkit/fileapi

webkit/fileapi/sandbox_mount_point_provider.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.
 
 #ifndef WEBKIT_FILEAPI_SANDBOX_MOUNT_POINT_PROVIDER_H_
 #define WEBKIT_FILEAPI_SANDBOX_MOUNT_POINT_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 49 matching lines @@
     // Returns the next origin.  Returns empty if there are no more origins.
     virtual GURL Next() = 0;
 
     // Returns the current origin's information.
     virtual bool HasFileSystemType(FileSystemType type) const = 0;
   };
 
   // The FileSystem directory name.
   static const base::FilePath::CharType kFileSystemDirectory[];
 
-  static bool CanHandleType(FileSystemType type);
+  static bool IsSandboxType(FileSystemType type);
 
   // |file_task_runner| is used to validate the root directory and delete the
   // obfuscated file util.
   SandboxMountPointProvider(
       quota::QuotaManagerProxy* quota_manager_proxy,
       base::SequencedTaskRunner* file_task_runner,
       const base::FilePath& profile_path,
       const FileSystemOptions& file_system_options);
   virtual ~SandboxMountPointProvider();
 
   // FileSystemMountPointProvider overrides.
+  virtual bool CanHandleType(FileSystemType type) const OVERRIDE;
   virtual void ValidateFileSystemRoot(
       const GURL& origin_url,
       FileSystemType type,
       bool create,
       const ValidateFileSystemCallback& callback) OVERRIDE;
   virtual base::FilePath GetFileSystemRootPathOnFileThread(
       const FileSystemURL& url,
       bool create) OVERRIDE;
   virtual FileSystemFileUtil* GetFileUtil(FileSystemType type) OVERRIDE;
   virtual AsyncFileUtil* GetAsyncFileUtil(FileSystemType type) OVERRIDE;
@@ skipping 145 matching lines @@
   bool enable_usage_tracking_;
 
   base::WeakPtrFactory<SandboxMountPointProvider> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SandboxMountPointProvider);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_SANDBOX_MOUNT_POINT_PROVIDER_H_