[NaCl SDK] nacl_io: Replace allocated ino with hash of path.

native_client_sdk/src/libraries/nacl_io/filesystem.h

 // Copyright 2013 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 LIBRARIES_NACL_IO_FILESYSTEM_H_
 #define LIBRARIES_NACL_IO_FILESYSTEM_H_
 
 #include <map>
 #include <string>
 
@@ skipping 77 matching lines @@
   virtual Error Mkdir(const Path& path, int permissions) = 0;
   virtual Error Rmdir(const Path& path) = 0;
   virtual Error Remove(const Path& path) = 0;
   virtual Error Rename(const Path& path, const Path& newpath) = 0;
   virtual Error Filesystem_VIoctl(int request, va_list args);
 
   // Helper function that forwards to Filesystem_VIoctl.
   Error Filesystem_Ioctl(int request, ...);
 
   // Assumes that |node| is non-NULL.
-  void OnNodeCreated(Node* node);
+  virtual void OnNodeCreated(Node* node);
 
   // Assumes that |node| is non-NULL.
-  void OnNodeDestroyed(Node* node);
+  virtual void OnNodeDestroyed(Node* node);
 
  protected:
   // Device number for the filesystem.
   int dev_;
   PepperInterface* ppapi_;  // Weak reference.
   INodePool inode_pool_;
 
  private:
   // May only be called by the KernelProxy when the Kernel's
   // lock is held, so we make it private.
   friend class KernelObject;
   friend class KernelProxy;
   DISALLOW_COPY_AND_ASSIGN(Filesystem);
 };
 
 }  // namespace nacl_io
 
 #endif  // LIBRARIES_NACL_IO_FILESYSTEM_H_