Reviewed by Alp Toker.

        http://bugs.webkit.org/show_bug.cgi?id=16346
        [GTK] Some webview parts must use the focused frame.

        Also update some old code.

        * WebView/webkitprivate.cpp:
        (getFrameFromView): removed

        * WebView/webkitprivate.h:
        (getFrameFromView): removed
        
        * WebView/webkitwebview.cpp:
        (webkit_web_view_expose_event):
        (webkit_web_view_key_press_event): use focused frame
        (webkit_web_view_key_release_event): use focused frame
        (webkit_web_view_button_press_event):
        (webkit_web_view_button_release_event):
        (webkit_web_view_motion_event):
        (webkit_web_view_scroll_event):
        (webkit_web_view_size_allocate):
        (webkit_web_view_set_scroll_adjustments):
        (webkit_web_view_execute_script):
        (webkit_web_view_stop_loading):
        (webkit_web_view_load_string):
        (webkit_web_view_reload):
        (webkit_web_view_open):
        (webkit_web_view_can_go_forward):
        (webkit_web_view_can_go_backward):
        (webkit_web_view_go_forward):
        (webkit_web_view_go_backward):

        * WebCoreSupport/EditorClientGtk.cpp:
        (WebKit::EditorClient::handleKeypress): fix for page up and page down keys for editable contents


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@28564 268f45cc-cd09-0410-ab3c-d52691b4dbfc