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

chrome/browser/ui/views/chrome_views_delegate.cc

Index: chrome/browser/ui/views/chrome_views_delegate.cc
diff --git a/chrome/browser/ui/views/chrome_views_delegate.cc b/chrome/browser/ui/views/chrome_views_delegate.cc
index cd63fabd562c0457fd6939b4ad24c511532ab371..a72e5486074a9b9ce8df203fbb6716d41fd0ea49 100644
--- a/chrome/browser/ui/views/chrome_views_delegate.cc
+++ b/chrome/browser/ui/views/chrome_views_delegate.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/views/accessibility_event_router_views.h"
+#include "chrome/browser/ui/views/event_utils.h"
 #include "chrome/browser/ui/window_sizer.h"
 #include "chrome/common/pref_names.h"
 #include "ui/base/clipboard/clipboard.h"
@@ -145,3 +146,7 @@ void ChromeViewsDelegate::AddRef() {
 void ChromeViewsDelegate::ReleaseRef() {
   g_browser_process->ReleaseModule();
 }
+
+int ChromeViewsDelegate::GetDispositionForEvent(int event_flags) {
+  return event_utils::DispositionFromEventFlags(event_flags);
+}