Add MenuModelAdapter to wrap ui::MenuModel with views::MenuDelegate interface.

views/test/test_views_delegate.h

Index: views/test/test_views_delegate.h
diff --git a/views/test/test_views_delegate.h b/views/test/test_views_delegate.h
index afa6d97a4630edd5d99f6bed02f23ea0c5f7abe5..ec3d0a660a63693653a235900ebee64eb47ffe73 100644
--- a/views/test/test_views_delegate.h
+++ b/views/test/test_views_delegate.h
@@ -51,6 +51,10 @@ class TestViewsDelegate : public views::ViewsDelegate {
   virtual void AddRef() OVERRIDE {}
   virtual void ReleaseRef() OVERRIDE {}
 
+  virtual int GetDispositionForEvent(int event_flags) OVERRIDE {
+    return 0;
+  }
+
  private:
   mutable scoped_ptr<ui::Clipboard> clipboard_;