Add WebKitUnitTestSupport::readFromFile and deprecate all PlatformFileHandle related methods

public/platform/WebFileUtilities.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 37 matching lines @@
 #ifdef WIN32
     typedef HANDLE FileHandle;
 #else
     typedef int FileHandle;
 #endif
     virtual bool getFileInfo(const WebString& path, WebFileInfo& result) { return false; }
     virtual WebString directoryName(const WebString& path)  { return WebString(); }
     virtual WebString baseName(const WebString& path)  { return WebString(); }
     virtual bool isDirectory(const WebString& path) { return false; }
     virtual WebURL filePathToURL(const WebString& path)  { return WebURL(); }
-    virtual FileHandle openFile(const WebString& path, int mode)  { return FileHandle(); }
-    // Should set the FileHandle to a invalid value if the file is closed successfully.
-    virtual void closeFile(FileHandle&) { }
-    virtual int readFromFile(FileHandle, char* data, int length) { return 0; }
 
 protected:
     ~WebFileUtilities() { }
 };
 
 } // namespace WebKit
 
 #endif