WebCore:

WebCore:

        Reviewed by Mitz.

        - fix <rdar://problem/5530185> WebKit does not show <object> fallback content when both
          URL and MIME type is omitted

        Already covered by existing tests (that had incorrect results).

        * loader/FrameLoader.cpp: (WebCore::FrameLoader::requestObject): Return false to indicate
        failure when both URL and MIME type are empty. The old code would not attempt a load, but
        it would indicate success.

        * rendering/RenderPartObject.cpp: (WebCore::RenderPartObject::updateWidget): Remove
        non-helpful early exit for the case where there is no URL and no type. Returning early
        prevents the fallback code from running.

WebKit:

        Reviewed by Mitz.

        - fix problem I ran into while doing some testing on Mac for
          <rdar://problem/5530185> WebKit does not show <object>
          fallback content when both URL and MIME type is omitted

        I don't know how to reproduce this failure in DumpRenderTree, so there is no
        regression test.

        * Plugins/WebNullPluginView.h: Removed some unneeded declarations, including
        the didSendError local variable. Instead we just set the error to nil once
        we've sent it.
        * Plugins/WebNullPluginView.mm:
        (-[WebNullPluginView initWithFrame:error:DOMElement:]): Refactored so that
        the null plug-in image code is separate from the rest of the function and
        so that the whole thing is not inside an if statement. Also don't hold a
        reference to the DOM element if there is no error to report.
        (-[WebNullPluginView reportFailure]): Added. Does the actual delegate
        callback. Happens back at the top level of the run loop so it doesn't
        fire deep inside layout. Also wrote this so that it is guaranteed not to
        reenter and so that it can handle the case where the delegate destroys
        the world (including this object). NOTE: This is not a real, general
        solution to the problem of plug-ins that do work inside layout. We will need
        a more general fix that works for other plug-ins, and we'll track that with
        a separate bug report.
        (-[WebNullPluginView viewDidMoveToWindow]): Removed most of the code;
        changed so it just does a performSelector:afterDelay:0.

LayoutTests:

        Reviewed by Mitz.

        - update tests affected by fix for <rdar://problem/5530185> WebKit does not show
          <object> fallback content when both URL and MIME type is omitted

        * dom/html/level2/html/AppletsCollection-expected.txt: The text "Nothing here!" renders now.
        * fast/dom/HTMLDocument/object-by-name-unknown-child-element-expected.txt: Some blank
        space renders now.
        * platform/mac/fast/invalid/residual-style-expected.txt: A font element renders now.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@27378 268f45cc-cd09-0410-ab3c-d52691b4dbfc