Check if the delegate in WebContents::CanTerminate is valid...

chrome/browser/web_contents.cc

Index: chrome/browser/web_contents.cc
===================================================================
--- chrome/browser/web_contents.cc	(revision 7901)
+++ chrome/browser/web_contents.cc	(working copy)
@@ -1342,6 +1342,9 @@
 }
 
 bool WebContents::CanTerminate() const {
+  if (!delegate())
+    return true;
+
   return !delegate()->IsExternalTabContainer();
 }
 
@@ -1358,7 +1361,8 @@
 void WebContents::BeforeUnloadFiredFromRenderManager(
     bool proceed,
     bool* proceed_to_fire_unload) {
-  delegate()->BeforeUnloadFired(this, proceed, proceed_to_fire_unload);
+  if (delegate())
+    delegate()->BeforeUnloadFired(this, proceed, proceed_to_fire_unload);
 }
 
 void WebContents::UpdateRenderViewSizeForRenderManager() {