Fix crash when following a link opening a new tab/window.

chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc

Index: chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc
diff --git a/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc b/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc
index 6d43469964cfe9aa94be5833d9b2ea25ec161ce3..adeee32615253d49bd89d777abbd50d4f9cce206 100644
--- a/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc
+++ b/chrome/browser/ui/sync/tab_contents_synced_tab_delegate.cc
@@ -85,7 +85,7 @@ int TabContentsSyncedTabDelegate::GetEntryCount() const {
 
 GURL TabContentsSyncedTabDelegate::GetVirtualURLAtIndex(int i) const {
   NavigationEntry* entry = GetPossiblyPendingEntryAtIndex(web_contents_, i);
-  return entry->GetVirtualURL();
+  return entry ? entry->GetVirtualURL() : GURL();
 }
 
 GURL TabContentsSyncedTabDelegate::GetFaviconURLAtIndex(int i) const {