Add WebKitUnitTestSupport::readFromFile and deprecate all PlatformFileHandle related methods

Source/core/platform/chromium/FileSystemChromium.cpp

 /*
  * Copyright (c) 2008, 2009, 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 57 matching lines @@
     metadata.length = webFileInfo.length;
     metadata.type = static_cast<FileMetadata::Type>(webFileInfo.type);
     return true;
 }
 
 String directoryName(const String& path)
 {
     return WebKit::Platform::current()->fileUtilities()->directoryName(path);
 }
 
-PlatformFileHandle openFile(const String& path, FileOpenMode mode)
-{
-    return WebKit::Platform::current()->fileUtilities()->openFile(path, mode);
-}
-
-void closeFile(PlatformFileHandle& handle)
-{
-    WebKit::Platform::current()->fileUtilities()->closeFile(handle);
-}
-
-int readFromFile(PlatformFileHandle handle, char* data, int length)
-{
-    return WebKit::Platform::current()->fileUtilities()->readFromFile(handle, data, length);
-}
-
 } // namespace WebCore