Reviewed by Ryosuke Niwa.

        Text selection changes unexpectedly when dragging out of the <input>
        https://bugs.webkit.org/show_bug.cgi?id=55552

        Tests that dragging outside of a contenteditable, input or textarea selects to the end of the
        element, rather than jumping back to the beginning.

        * editing/selection/resources/select-out-of-floated-editable.js: Added.
        (log):
        (else.window.onmouseup):
        (getSelectionStart):
        (getSelectionEnd):
        (checkSelection):
        * editing/selection/select-out-of-editable-expected.txt: Added.
        * editing/selection/select-out-of-editable.html: Added.
        * editing/selection/select-out-of-floated-contenteditable-expected.txt: Added.
        * editing/selection/select-out-of-floated-contenteditable.html: Added.
        * editing/selection/select-out-of-floated-input-expected.txt: Added.
        * editing/selection/select-out-of-floated-input.html: Added.
        * editing/selection/select-out-of-floated-textarea-expected.txt: Added.
        * editing/selection/select-out-of-floated-textarea.html: Added.
2011-04-15  Alice Boxhall  <aboxhall@chromium.org>

        Reviewed by Ryosuke Niwa.

        Text selection changes unexpectedly when dragging out of the <input>
        https://bugs.webkit.org/show_bug.cgi?id=55552

        Tests: editing/selection/select-out-of-editable.html
               editing/selection/select-out-of-floated-contenteditable.html
               editing/selection/select-out-of-floated-input.html
               editing/selection/select-out-of-floated-textarea.html

        * page/EventHandler.cpp:
        (WebCore::selectionExtentRespectingEditingBoundary): When dragging from an editable element, check that
        the endpoint is not outside the element. If it is, translate the point into a local point within
        the editable element.
        (WebCore::EventHandler::updateSelectionForMouseDrag): Call targetPositionForSelectionEndpoint() to
        calculate the selection endpoint.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83967 268f45cc-cd09-0410-ab3c-d52691b4dbfc