single-file input elements should refuse multi-file drags

single-file input elements should refuse multi-file drags
https://bugs.webkit.org/show_bug.cgi?id=25913

Patch by Rakesh KN <rakesh.kn@motorola.com> on 2012-01-30
Reviewed by Eric Seidel.

Refuse the multiple file drags onto a single file input element.

Source/WebCore:

No new tests: Covered by existing tests, updated the expected results.

* page/DragController.cpp:
(WebCore::DragController::tryDocumentDrag):
Setting the dragSession.numberOfItemsToBeAccepted to 0 so that drag operation is none if the
file input element under mouse is single input type and number of files dragged onto that
input element are more than 1.

LayoutTests:

* editing/pasteboard/file-input-files-access-expected.txt:
Expected result changed.
* editing/pasteboard/script-tests/file-input-files-access.js:
(runTest):
Removed the 'FIXME' debug and comment as it is not valid after this change.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106301 268f45cc-cd09-0410-ab3c-d52691b4dbfc