adds DesktopNotificationService to Profile

chrome/test/testing_profile.h

Index: chrome/test/testing_profile.h
diff --git a/chrome/test/testing_profile.h b/chrome/test/testing_profile.h
index 8f49917ef2eaa00daf4b6d0b4f4a421ccee5af96..ca10ebd710960567110a45a8fa5d2ded52370d8c 100644
--- a/chrome/test/testing_profile.h
+++ b/chrome/test/testing_profile.h
@@ -173,6 +173,9 @@ class TestingProfile : public Profile {
   virtual void MarkAsCleanShutdown() {}
   virtual void InitExtensions() {}
   virtual void InitWebResources() {}
+  virtual DesktopNotificationService* GetDesktopNotificationService() {
+    return NULL;
+  }
 
   // Schedules a task on the history backend and runs a nested loop until the
   // task is processed.  This has the effect of blocking the caller until the