Remove custom binding for the Clipboard clearData function
https://bugs.webkit.org/show_bug.cgi?id=116421

Reviewed by Andreas Kling.

* bindings/js/JSClipboardCustom.cpp: Removed the clearData binding.

* dom/Clipboard.idl: Removed [Custom].

* dom/Clipboard.cpp:
(WebCore::Clipboard::clearData): Renamed from clearAllData.
* dom/Clipboard.h: Rename clearAllData to clearData so we just use
overloading for the one with and without a MIME type.
* platform/ios/ClipboardIOS.h: Rename clearAllData to clearData.
* platform/ios/ClipboardIOS.mm:
(WebCore::ClipboardIOS::clearData): Ditto.
* platform/qt/ClipboardQt.cpp:
(WebCore::ClipboardQt::clearData). Ditto.
* platform/qt/ClipboardQt.h: Ditto.
* platform/win/ClipboardWin.cpp:
(WebCore::ClipboardWin::clearData): Ditto.
* platform/win/ClipboardWin.h: Ditto.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150373 268f45cc-cd09-0410-ab3c-d52691b4dbfc