Fix for ERROR:url_pattern_set.cc(240)] Invalid url pattern: chrome://print/*

chrome/browser/extensions/test_extension_prefs.h

Index: chrome/browser/extensions/test_extension_prefs.h
diff --git a/chrome/browser/extensions/test_extension_prefs.h b/chrome/browser/extensions/test_extension_prefs.h
index b451b715ab5d4a385e418d7e2a8d00114fbbfaec..94a383ca9757fb28e6e34508640190ab952f297b 100644
--- a/chrome/browser/extensions/test_extension_prefs.h
+++ b/chrome/browser/extensions/test_extension_prefs.h
@@ -78,6 +78,9 @@ class TestExtensionPrefs {
   // assigned.
   std::string AddExtensionAndReturnId(const std::string& name);
 
+  // This will add extension in our ExtensionPrefs.
+  void AddExtension(Extension* extension);
+
   PrefService* CreateIncognitoPrefService() const;
 
   // Allows disabling the loading of preferences of extensions. Becomes