Fix crash in CreateTabFunction::RunImpl().

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 f737d37cff16fb875b593f9c50bf7b21826b7e6c..62e6c18be2dcf10e0a3a56f53b933a08ddfc398d 100644
--- a/chrome/browser/extensions/extension_tabs_module.cc
+++ b/chrome/browser/extensions/extension_tabs_module.cc
@@ -961,6 +961,9 @@ bool CreateTabFunction::RunImpl() {
   params.tabstrip_add_types = add_types;
   browser::Navigate(&params);
 
+  // The tab may have been created in a different window, so make sure we look
+  // at the right tab strip.
+  tab_strip = params.browser->tabstrip_model();
   int new_index = tab_strip->GetIndexOfTabContents(params.target_contents);
   if (opener)
     tab_strip->SetOpenerOfTabContentsAt(new_index, opener);