<rdar://problem/5424801> REGRESSION (r25151): Web page area of window doesn...

    <rdar://problem/5424801> REGRESSION (r25151): Web page area of window doesn't redraw if page isn't loaded

        Don't bypass WebView WM_PAINT if the WebView has never committed a page.
        Added getter for committedFirstRealDocumentLoad.

        Reviewed by Maciej.

        * WebView.cpp:
        (WebViewWndProc): Don't skip painting if we haven't committed any pages in this view.
        * loader/FrameLoader.h: Added committedFirstRealDocumentLoad.
        (WebCore::FrameLoader::committedFirstRealDocumentLoad): Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@25270 268f45cc-cd09-0410-ab3c-d52691b4dbfc