Reviewed by Oliver.

        <rdar://problem/4954319> 
        Acrobat 7 / Safari crash: CrashTracer: 99 crashes in Safari at 
        com.apple.WebCore: WebCore::NetscapePlugInStreamLoader::isDone const + 0
        
        Add tests.
        
        * plugins/return-error-from-new-stream-callback-in-full-frame-plugin-expected.txt: Added.
        * plugins/return-error-from-new-stream-callback-in-full-frame-plugin.html: Added.

WebCore:

        Reviewed by Oliver.

        Add DocumentLoader::isLoadingMainResource.

        * WebCore.exp:

WebKit:

        Reviewed by Oliver.

        <rdar://problem/4954319> 
        Acrobat 7 / Safari crash: CrashTracer: 99 crashes in Safari at 
        com.apple.WebCore: WebCore::NetscapePlugInStreamLoader::isDone const + 0

        Add a new initWithFrameLoader: method to WebNetscapePluginStream which is to be used when
        the stream is a "fake" stream for full frame plug-ins.
        
        * Plugins/WebBaseNetscapePluginView.mm:
        (-[WebBaseNetscapePluginView pluginView:receivedResponse:]):
        * Plugins/WebNetscapePluginStream.h:
        * Plugins/WebNetscapePluginStream.mm:
        (-[WebNetscapePluginStream initWithFrameLoader:]):
        (-[WebNetscapePluginStream initWithRequest:plugin:notifyData:sendNotification:]):
        (-[WebNetscapePluginStream start]):
        (-[WebNetscapePluginStream cancelLoadWithError:]):
        (-[WebNetscapePluginStream stop]):
        * WebCoreSupport/WebFrameLoaderClient.mm:
        (WebFrameLoaderClient::createFrame):

WebKitTools:

        Reviewed by Oliver.

        <rdar://problem/4954319> 
        Acrobat 7 / Safari crash: CrashTracer: 99 crashes in Safari at 
        com.apple.WebCore: WebCore::NetscapePlugInStreamLoader::isDone const + 0
        
        If the src url is "data:application/x-webkit-test-netscape,returnerrorfromnewstream", 
        return an error from NPP_NewStream.
        
        * DumpRenderTree/TestNetscapePlugIn.subproj/PluginObject.c:
        (pluginAllocate):
        * DumpRenderTree/TestNetscapePlugIn.subproj/PluginObject.h:
        * DumpRenderTree/TestNetscapePlugIn.subproj/main.c:
        (NPP_New):
        (NPP_NewStream):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@24118 268f45cc-cd09-0410-ab3c-d52691b4dbfc