[fsp] Add throttling for number of opened files.

chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
+#include "chrome/browser/chromeos/file_system_provider/abort_callback.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_observer.h"
 #include "chrome/browser/chromeos/file_system_provider/watcher.h"
 #include "storage/browser/fileapi/async_file_util.h"
 #include "storage/browser/fileapi/watcher_manager.h"
 #include "url/gurl.h"
 
 class EventRouter;
 
 namespace base {
 class Time;
@@ skipping 46 matching lines @@
   typedef base::Callback<void(int file_handle, base::File::Error result)>
       OpenFileCallback;
 
   typedef base::Callback<
       void(int chunk_length, bool has_more, base::File::Error result)>
       ReadChunkReceivedCallback;
 
   typedef base::Callback<void(scoped_ptr<EntryMetadata> entry_metadata,
                               base::File::Error result)> GetMetadataCallback;
 
-  typedef base::Callback<void(
-      const storage::AsyncFileUtil::StatusCallback& callback)> AbortCallback;
-
   // Mask of fields requested from the GetMetadata() call.
   typedef int MetadataFieldMask;
 
   virtual ~ProvidedFileSystemInterface() {}
 
   // Requests unmounting of the file system. The callback is called when the
   // request is accepted or rejected, with an error code.
   virtual AbortCallback RequestUnmount(
       const storage::AsyncFileUtil::StatusCallback& callback) = 0;
 
@@ skipping 130 matching lines @@
   virtual void RemoveObserver(ProvidedFileSystemObserver* observer) = 0;
 
   // Returns a weak pointer to this object.
   virtual base::WeakPtr<ProvidedFileSystemInterface> GetWeakPtr() = 0;
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_