Bug 482921 part 14 - Address review comments. r=Olli.Pettay.

parser/html/nsHtml5TreeOpExecutor.cpp

@@ -905,6 +905,8 @@ nsHtml5TreeOpExecutor::GetViewSourceBaseURI()
       NS_ASSERTION(nested, "URI with scheme view-source didn't QI to nested!");
       nested->GetInnerURI(getter_AddRefs(mViewSourceBaseURI));
     } else {
+      // Fail gracefully if the base URL isn't a view-source: URL.
+      // Not sure if this can ever happen.
       mViewSourceBaseURI = orig;
     }
   }