Merge 30496 - First attempt at fixing a crash that occurs when we get into We...

webkit/glue/webframeloaderclient_impl.cc

Index: webkit/glue/webframeloaderclient_impl.cc
===================================================================
--- webkit/glue/webframeloaderclient_impl.cc	(revision 30764)
+++ webkit/glue/webframeloaderclient_impl.cc	(working copy)
@@ -628,9 +628,14 @@
   DCHECK(ds) << "DataSource NULL when navigating to reference fragment";
   if (ds) {
     GURL url = ds->request().url();
-    GURL chain_end = ds->GetEndOfRedirectChain();
-    ds->ClearRedirectChain();
+    GURL chain_end;
 
+    if (ds->HasRedirectChain()){
+      chain_end = ds->GetEndOfRedirectChain();
+      ds->ClearRedirectChain();
+    }
+
+
     // Figure out if this location change is because of a JS-initiated client
     // redirect (e.g onload/setTimeout document.location.href=).
     // TODO(timsteele): (bugs 1085325, 1046841) We don't get proper redirect