Reviewed by Eric Seidel.

        Remove forceUserGesture bool in favor of UserGestureIndicator
        https://bugs.webkit.org/show_bug.cgi?id=62702

        This patch is an intermediate step towards removing the
        forceUserGesture bool.  In this patch, we use the user gesture
        indicator to store the gesture state instead of encoding it in the URL
        of the script source code.  In a future patch, we'll push the indicator
        higher up the stack, closer to the reason for setting it.

        * bindings/ScriptControllerBase.cpp:
        (WebCore::ScriptController::executeScript):
        (WebCore::ScriptController::executeIfJavaScriptURL):
        * bindings/js/ScriptController.cpp:
        (WebCore::ScriptController::executeScriptInWorld):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@88998 268f45cc-cd09-0410-ab3c-d52691b4dbfc