Reviewed by Ryosuke Niwa.

        RTL: Caret goes to the opposite direction when pressing an arrow key after selection is made
        https://bugs.webkit.org/show_bug.cgi?id=49511

        Test: editing/selection/rtl-move-selection-right-left.html

        * editing/SelectionController.cpp:
        (WebCore::SelectionController::willBeModified):
        Respecting the direction of the containing block when switching selection base and extent in
        RTL content.

        (WebCore::SelectionController::modifyMovingRight):
        (WebCore::SelectionController::modifyMovingLeft):
        Using directionOfEnclosingBlock when deciding to use the selection start or end to do the
        correct thing for RTL.
2011-01-20  Levi Weintraub  <leviw@chromium.org>

        Reviewed by Ryosuke Niwa.

        RTL: Caret goes to the opposite direction when pressing an arrow key after selection is made
        https://bugs.webkit.org/show_bug.cgi?id=49511

        * editing/editing.js:
        (execMoveSelectionLeftByCharacterCommand):
        (moveSelectionLeftByCharacterCommand):
        (execMoveSelectionRightByCharacterCommand):
        (moveSelectionRightByCharacterCommand):
        (execExtendSelectionLeftByCharacterCommand):
        (extendSelectionLeftByCharacterCommand):
        (execExtendSelectionRightByCharacterCommand):
        (extendSelectionRightByCharacterCommand):
        Adding some left/right selection convenience methods for use with RTL tests.

        * editing/selection/rtl-move-selection-right-left-expected.txt: Added.
        * editing/selection/rtl-move-selection-right-left.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76312 268f45cc-cd09-0410-ab3c-d52691b4dbfc