Extract a DOMWindow interface from LocalDOMWindow and use it in the idl.

Source/modules/filesystem/DOMWindowFileSystem.cpp

 /*
  * Copyright (C) 2012, 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 30 matching lines @@
 namespace blink {
 
 DOMWindowFileSystem::DOMWindowFileSystem()
 {
 }
 
 DOMWindowFileSystem::~DOMWindowFileSystem()
 {
 }
 
-void DOMWindowFileSystem::webkitRequestFileSystem(LocalDOMWindow& window, int type, long long size, FileSystemCallback* successCallback, ErrorCallback* errorCallback)
+void DOMWindowFileSystem::webkitRequestFileSystem(DOMWindow& windowArg, int type, long long size, FileSystemCallback* successCallback, ErrorCallback* errorCallback)
 {
+    LocalDOMWindow& window = toLocalDOMWindow(windowArg);
     if (!window.isCurrentlyDisplayedInFrame())
         return;
 
     Document* document = window.document();
     if (!document)
         return;
 
     if (!document->securityOrigin()->canAccessFileSystem()) {
         DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::SECURITY_ERR));
         return;
     }
 
     FileSystemType fileSystemType = static_cast<FileSystemType>(type);
     if (!DOMFileSystemBase::isValidType(fileSystemType)) {
         DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::INVALID_MODIFICATION_ERR));
         return;
     }
 
     LocalFileSystem::from(*document)->requestFileSystem(document, fileSystemType, size, FileSystemCallbacks::create(successCallback, errorCallback, document, fileSystemType));
 }
 
-void DOMWindowFileSystem::webkitResolveLocalFileSystemURL(LocalDOMWindow& window, const String& url, EntryCallback* successCallback, ErrorCallback* errorCallback)
+void DOMWindowFileSystem::webkitResolveLocalFileSystemURL(DOMWindow& windowArg, const String& url, EntryCallback* successCallback, ErrorCallback* errorCallback)
 {
+    LocalDOMWindow& window = toLocalDOMWindow(windowArg);
     if (!window.isCurrentlyDisplayedInFrame())
         return;
 
     Document* document = window.document();
     if (!document)
         return;
 
     SecurityOrigin* securityOrigin = document->securityOrigin();
     KURL completedURL = document->completeURL(url);
     if (!securityOrigin->canAccessFileSystem() || !securityOrigin->canRequest(completedURL)) {
         DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::SECURITY_ERR));
         return;
     }
 
     if (!completedURL.isValid()) {
         DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::ENCODING_ERR));
         return;
     }
 
     LocalFileSystem::from(*document)->resolveURL(document, completedURL, ResolveURICallbacks::create(successCallback, errorCallback, document));
 }
 
 COMPILE_ASSERT(static_cast<int>(DOMWindowFileSystem::TEMPORARY) == static_cast<int>(FileSystemTypeTemporary), enum_mismatch);
 COMPILE_ASSERT(static_cast<int>(DOMWindowFileSystem::PERSISTENT) == static_cast<int>(FileSystemTypePersistent), enum_mismatch);
 
 } // namespace blink