<http://webkit.org/b/54505> Move -[WebDynamicScrollBarsView inProgrammaticScroll] to WebDynamicScrollBarsViewInternal.h

        Reviewed by Darin Adler.

        * WebView/WebDynamicScrollBarsView.h:
        (-[WebDynamicScrollBarsView inProgrammaticScroll]): Removed
        declaration.
        * WebView/WebDynamicScrollBarsView.mm:
        (-[WebDynamicScrollBarsView inProgrammaticScroll]): Moved
        implementation into correct category.
        * WebView/WebDynamicScrollBarsViewInternal.h:
        (-[WebDynamicScrollBarsView inProgrammaticScroll]): Added
        declaration.
        * WebView/WebHTMLView.mm: Included
        WebDynamicScrollBarsViewInternal.h instead of
        WebDynamicScrollBarsView.h.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@78674 268f45cc-cd09-0410-ab3c-d52691b4dbfc