Make MountPointProvider pluggable from outside webkit/fileapi

webkit/chromeos/fileapi/cros_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_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_
 #define WEBKIT_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
+#include "webkit/fileapi/file_system_types.h"
 #include "webkit/quota/special_storage_policy.h"
 #include "webkit/storage/webkit_storage_export.h"
 
 namespace fileapi {
 class AsyncFileUtilAdapter;
 class CopyOrMoveFileValidatorFactory;
 class ExternalMountPoints;
 class FileSystemFileUtil;
 class FileSystemURL;
 class IsolatedContext;
@@ skipping 18 matching lines @@
       scoped_refptr<fileapi::ExternalMountPoints> mount_points,
       fileapi::ExternalMountPoints* system_mount_points);
   virtual ~CrosMountPointProvider();
 
   // Returns true if CrosMountpointProvider can handle |url|, i.e. its
   // file system type matches with what this provider supports.
   // This could be called on any threads.
   static bool CanHandleURL(const fileapi::FileSystemURL& url);
 
   // fileapi::FileSystemMountPointProvider overrides.
+  virtual bool CanHandleType(fileapi::FileSystemType type) const OVERRIDE;
   virtual void ValidateFileSystemRoot(
       const GURL& origin_url,
       fileapi::FileSystemType type,
       bool create,
       const ValidateFileSystemCallback& callback) OVERRIDE;
   virtual base::FilePath GetFileSystemRootPathOnFileThread(
       const fileapi::FileSystemURL& url,
       bool create) OVERRIDE;
   virtual fileapi::FileSystemFileUtil* GetFileUtil(
       fileapi::FileSystemType type) OVERRIDE;
@@ skipping 68 matching lines @@
   // Globally visible mount points. System MountPonts instance should outlive
   // all CrosMountPointProvider instances, so raw pointer is safe.
   fileapi::ExternalMountPoints* system_mount_points_;
 
   DISALLOW_COPY_AND_ASSIGN(CrosMountPointProvider);
 };
 
 }  // namespace chromeos
 
 #endif  // WEBKIT_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_