IsCommandIdEnabled should not fall though if the base did handle the command id

athena/content/render_view_context_menu_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "athena/content/render_view_context_menu_impl.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "components/renderer_context_menu/context_menu_content_type.h"
 #include "components/renderer_context_menu/views/toolkit_delegate_views.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 135 matching lines @@
     ui::Accelerator* accelerator) {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool RenderViewContextMenuImpl::IsCommandIdChecked(int command_id) const {
   return false;
 }
 
 bool RenderViewContextMenuImpl::IsCommandIdEnabled(int command_id) const {
-  if (RenderViewContextMenuBase::IsCommandIdEnabled(command_id))
-    return true;
+  {
+    bool enabled = false;
+    if (RenderViewContextMenuBase::IsCommandIdKnown(command_id, &enabled))
+      return enabled;
+  }
   switch (command_id) {
     // Navigation
     case CMD_BACK:
       return source_web_contents_->GetController().CanGoBack();
     case CMD_FORWARD:
       return source_web_contents_->GetController().CanGoForward();
     case CMD_RELOAD:
       return true;
     case CMD_VIEW_SOURCE:
       return source_web_contents_->GetController().CanViewSource();
@@ skipping 87 matching lines @@
       source_web_contents_->Delete();
       break;
 
     case CMD_SELECT_ALL:
       source_web_contents_->SelectAll();
       break;
   }
 }
 
 }  // namespace athena