Bug #56938 --> add a method for retrieving the doc loader's

document channel.
r=sspitzer, sr=rpotts

uriloader/base/nsDocLoader.cpp

@@ -571,6 +571,13 @@ nsresult nsDocLoaderImpl::RemoveChildGroup(nsDocLoaderImpl* aLoader)
   return rv;
 }
 
+NS_IMETHODIMP nsDocLoaderImpl::GetDocumentChannel(nsIChannel ** aChannel)
+{
+  *aChannel = mDocumentChannel;
+  NS_IF_ADDREF(*aChannel);
+  return NS_OK;
+}
+
 
 void nsDocLoaderImpl::DocLoaderIsEmpty(nsresult aStatus)
 {

uriloader/base/nsIDocumentLoader.idl

@@ -51,6 +51,7 @@ interface nsIDocumentLoader : nsISupports
   // this should really be in a private interface as it is only
   // called between a parent doc loader and it's child.
   void clearParentDocLoader();
+  readonly attribute nsIChannel documentChannel;
 
   void fireOnLocationChange(in nsIWebProgress aWebProgress,
                             in nsIRequest aRequest,