remove use of {,un}setPendingActivity from DOMFileSystem.

Source/modules/filesystem/DOMFileSystem.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 43 matching lines @@
     // Creates a new isolated file system for the given filesystemId.
     static PassRefPtrWillBeRawPtr<DOMFileSystem> createIsolatedFileSystem(ExecutionContext*, const String& filesystemId);
 
     PassRefPtrWillBeRawPtr<DirectoryEntry> root();
 
     // DOMFileSystemBase overrides.
     virtual void addPendingCallbacks() OVERRIDE;
     virtual void removePendingCallbacks() OVERRIDE;
     virtual void reportError(PassOwnPtr<ErrorCallback>, PassRefPtrWillBeRawPtr<FileError>) OVERRIDE;
 
+    // ActiveDOMObject overrides.
+    virtual bool hasPendingActivity() const OVERRIDE;
+
     void createWriter(const FileEntry*, PassOwnPtr<FileWriterCallback>, PassOwnPtr<ErrorCallback>);
     void createFile(const FileEntry*, PassOwnPtr<FileCallback>, PassOwnPtr<ErrorCallback>);
 
     // Schedule a callback. This should not cross threads (should be called on the same context thread).
     // FIXME: move this to a more generic place.
     template <typename CB, typename CBArg>
     static void scheduleCallback(ExecutionContext*, PassOwnPtr<CB>, PassRefPtrWillBeRawPtr<CBArg>);
 
     template <typename CB, typename CBArg>
     static void scheduleCallback(ExecutionContext*, PassOwnPtr<CB>, const CBArg&);
@@ skipping 44 matching lines @@
 
         virtual void performTask(ExecutionContext*) OVERRIDE
         {
             m_callback->handleEvent(m_callbackArg);
         }
 
     private:
         OwnPtr<CB> m_callback;
         CBArg m_callbackArg;
     };
+
+    int m_numberOfPendingCallbacks;
 };
 
 template <typename CB, typename CBArg>
 void DOMFileSystem::scheduleCallback(ExecutionContext* executionContext, PassOwnPtr<CB> callback, PassRefPtrWillBeRawPtr<CBArg> arg)
 {
     ASSERT(executionContext->isContextThread());
     if (callback)
         executionContext->postTask(adoptPtr(new DispatchCallbacRefPtrArgTask<CB, CBArg>(callback, arg)));
 }
 
 template <typename CB, typename CBArg>
 void DOMFileSystem::scheduleCallback(ExecutionContext* executionContext, PassOwnPtr<CB> callback, const CBArg& arg)
 {
     ASSERT(executionContext->isContextThread());
     if (callback)
         executionContext->postTask(adoptPtr(new DispatchCallbackNonPtrArgTask<CB, CBArg>(callback, arg)));
 }
 
 } // namespace
 
 #endif // DOMFileSystem_h