* kjs/function.h: Change ActivationImp around.
        * kjs/function.cpp:
        (FunctionImp::call): Pass a pointer to the arguments list to avoid ref/unref.
        (FunctionImp::get): Get the function pointer from the context directly,
	not the activation object.
        (ArgumentsImp::ArgumentsImp): Add an overload that takes no arguments.
        (ActivationImp::ActivationImp): Store a context pointer and an arguments object pointer.
        (ActivationImp::get): Special case for arguments, create it and return it.
        (ActivationImp::put): Special case for arguments, can't be set.
        (ActivationImp::hasProperty): Special case for arguments, return true.
        (ActivationImp::deleteProperty): Special case for arguments, refuse to delete.
        (ActivationImp::mark): Mark the arguments object.
        (ActivationImp::createArgumentsObject): Do the work of actually creating it.
        (GlobalFuncImp::call): Use stack-based objects for the ContextImp and ExecState.

        * kjs/internal.h: Keep function and arguments pointer in the context.
        * kjs/internal.cpp:
        (ContextImp::ContextImp): Don't pass in the func and args when making an ActivationImp.
        (InterpreterImp::evaluate): Use stack-based objects here.

        * kjs/types.h: Add ArgumentList as a synonym for List, soon to be separate.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2792 268f45cc-cd09-0410-ab3c-d52691b4dbfc