Reviewed by Adam Roben.

        Bug 16137: Web Inspector window on Leopard should have a unified toolbar and window title
        http://bugs.webkit.org/show_bug.cgi?id=16137

        On Leopard the toolbar background will be transparent, to allow the
        window background to show through the transparent WebView. The 
        search results divs needed to move inside the "main" div, so they
        would be clipped and not show where the toolbar is.

        * page/InspectorController.cpp:
        (WebCore::platform): Return a string for which platform we are.
        (WebCore::InspectorController::windowScriptObjectAvailable):
        Define the platform function on the JavaScript class.
        * page/inspector/Panel.js: Add panels to the panels div.
        * page/inspector/inspector.css: On the Leopard platform make
        the toolbar background transparent so the window background shows.
        * page/inspector/inspector.html: Add a panels div and move search
        result di...