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

chrome/browser/ui/views/accessibility_event_router_views_unittest.cc

Index: chrome/browser/ui/views/accessibility_event_router_views_unittest.cc
diff --git a/chrome/browser/ui/views/accessibility_event_router_views_unittest.cc b/chrome/browser/ui/views/accessibility_event_router_views_unittest.cc
index c288e91bbc34edcb26fd59d125eec2824adff2cc..3ca646620f492b609c13df1d7da40404407e11ad 100644
--- a/chrome/browser/ui/views/accessibility_event_router_views_unittest.cc
+++ b/chrome/browser/ui/views/accessibility_event_router_views_unittest.cc
@@ -65,6 +65,10 @@ class AccessibilityViewsDelegate : public views::ViewsDelegate {
   virtual void AddRef() {}
   virtual void ReleaseRef() {}
 
+  virtual int GetDispositionForEvent(int event_flags) OVERRIDE {
+    return 0;
+  }
+
   DISALLOW_COPY_AND_ASSIGN(AccessibilityViewsDelegate);
 };