Revert "Extensions: tab.title should not be undefined."

chrome/browser/extensions/extension_tabs_module.cc

Index: chrome/browser/extensions/extension_tabs_module.cc
diff --git a/chrome/browser/extensions/extension_tabs_module.cc b/chrome/browser/extensions/extension_tabs_module.cc
index 2d3e70ceeb5d32853b3cc92d17f4c1b5789892f9..12028c241572fa1ba614827a124fcc6b58e1f969 100644
--- a/chrome/browser/extensions/extension_tabs_module.cc
+++ b/chrome/browser/extensions/extension_tabs_module.cc
@@ -115,9 +115,10 @@ DictionaryValue* ExtensionTabUtil::CreateTabValue(
   result->SetString(keys::kStatusKey, GetTabStatusText(status));
   result->SetBoolean(keys::kSelectedKey,
                      tab_strip && tab_index == tab_strip->selected_index());
-  result->SetString(keys::kTitleKey, UTF16ToWide(contents->GetTitle()));
 
   if (status != TAB_LOADING) {
+    result->SetString(keys::kTitleKey, UTF16ToWide(contents->GetTitle()));
+
     NavigationEntry* entry = contents->controller().GetActiveEntry();
     if (entry) {
       if (entry->favicon().is_valid())