Bug 1319111 - Expose 'result principal URI' on LoadInfo as a source for NS_GetFinalChannelURI (removes some use of LOAD_REPLACE flag). r=bz

docshell/base/nsDocShell.cpp

@@ -11182,6 +11182,12 @@ nsDocShell::DoURILoad(nsIURI* aURI,
 
   if (aOriginalURI) {
     channel->SetOriginalURI(aOriginalURI);
+    // The LOAD_REPLACE flag and its handling here will be removed as part
+    // of bug 1319110.  For now preserve its restoration here to not break
+    // any code expecting it being set specially on redirected channels.
+    // If the flag has originally been set to change result of
+    // NS_GetFinalChannelURI it won't have any effect and also won't cause
+    // any harm.
     if (aLoadReplace) {
       uint32_t loadFlags;
       channel->GetLoadFlags(&loadFlags);