Remove ~1750 superfluous includes from core

Source/core/platform/chromium/ChromiumDataObjectItem.cpp

 /*
  * Copyright (C) 2011 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * 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.
  */
 
 #include "config.h"
 #include "core/platform/chromium/ChromiumDataObjectItem.h"
 
-#include "core/dom/Clipboard.h"
 #include "core/dom/DataTransferItem.h"
 #include "core/dom/StringCallback.h"
 #include "core/fileapi/Blob.h"
 #include "core/fileapi/File.h"
 #include "core/platform/SharedBuffer.h"
-#include "core/platform/chromium/ClipboardChromium.h"
 #include "core/platform/chromium/ClipboardMimeTypes.h"
 #include "core/platform/chromium/ClipboardUtilitiesChromium.h"
 
 #include <public/Platform.h>
 #include <public/WebClipboard.h>
 
 namespace WebCore {
 
 PassRefPtr<ChromiumDataObjectItem> ChromiumDataObjectItem::createFromString(const String& type, const String& data)
 {
@@ skipping 127 matching lines @@
 
 bool ChromiumDataObjectItem::isFilename() const
 {
     // FIXME: https://bugs.webkit.org/show_bug.cgi?id=81261: When we properly support File dragout,
     // we'll need to make sure this works as expected for DragDataChromium.
     return m_kind == DataTransferItem::kindFile && m_file;
 }
 
 } // namespace WebCore