Reviewed by Darin.

        <rdar://problem/5424866> Bottom portion of any Web Clip widget appears transparent

        Restore the previous behavior, creating plug-ins on attach, for WebKit plug-ins. Netscape plug-ins
        are still created during the first layout.
        
        * html/HTMLEmbedElement.cpp:
        (WebCore::HTMLEmbedElement::getInstance):
        Only call layout if the renderer doesn't have a widget.
        
        * html/HTMLObjectElement.cpp:
        (WebCore::HTMLObjectElement::getInstance):
        Likewise.
        
        * loader/FrameLoader.cpp:
        (WebCore::FrameLoader::shouldUsePlugin):
        Update for enum change.
        
        * loader/FrameLoaderTypes.h:
        Add ObjectContentNetscapePlugin and ObjectContentOtherPlugin.
        
        * page/mac/WebCoreFrameBridge.h:
        Get rid of the enum here, we can use the one in FrameLoaderTypes.h
        
        * rendering/RenderPartObject.cpp:
        (WebCore::RenderPartObject::updateWidget):
        Only create the plug-in if it's not a Netscape plug-in.
        
        (WebCore::RenderPartObject::layout):
        Fix indentation.

WebKit:

        Reviewed by Darin.

        <rdar://problem/5424866> Bottom portion of any Web Clip widget appears transparent
        
        * WebCoreSupport/WebFrameBridge.mm:
        Use the enum from FrameLoaderTypes.h.
        
        * WebCoreSupport/WebFrameLoaderClient.mm:
        (WebFrameLoaderClient::objectContentType):
        Return ObjectContentNetscapePlugin and ObjectContentOtherPlugin depending on the plug-in type.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@25283 268f45cc-cd09-0410-ab3c-d52691b4dbfc