Clean up forward declarations in Source/modules

Source/modules/filesystem/DOMFileSystemBase.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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DOMFileSystemBase_h
 #define DOMFileSystemBase_h
 
 #include "modules/filesystem/FileSystemFlags.h"
 #include "platform/FileSystemType.h"
-#include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
-#include "wtf/text/WTFString.h"
 
 namespace blink {
 class WebFileSystem;
 }
 
 namespace blink {
 
-class DirectoryEntry;
 class DirectoryReaderBase;
 class EntriesCallback;
 class EntryBase;
 class EntryCallback;
 class ErrorCallback;
 class File;
 class FileError;
 struct FileMetadata;
 class MetadataCallback;
 class ExecutionContext;
@@ skipping 71 matching lines @@
     FileSystemType m_type;
     KURL m_filesystemRootURL;
     bool m_clonable;
 };
 
 inline bool operator==(const DOMFileSystemBase& a, const DOMFileSystemBase& b) { return a.name() == b.name() && a.type() == b.type() && a.rootURL() == b.rootURL(); }
 
 } // namespace blink
 
 #endif // DOMFileSystemBase_h