Hide default context menu for platform apps.

chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/views/tab_contents/tab_contents_view_views.h"
 
 #include <vector>
 
 #include "base/time.h"
 #include "chrome/browser/ui/constrained_window.h"
@@ skipping 323 matching lines @@
 void TabContentsViewViews::ShowContextMenu(const ContextMenuParams& params) {
   // Allow delegates to handle the context menu operation first.
   if (tab_contents_->delegate() &&
       tab_contents_->delegate()->HandleContextMenu(params)) {
     return;
   }
 
   context_menu_.reset(new RenderViewContextMenuViews(tab_contents_, params));
   context_menu_->Init();
 
+  // Don't show empty menus.
+  if (context_menu_->menu_model().GetItemCount() == 0)
+    return;
+
   gfx::Point screen_point(params.x, params.y);
   views::View::ConvertPointToScreen(GetRootView(), &screen_point);
 
   // Enable recursive tasks on the message loop so we can get updates while
   // the context menu is being displayed.
   bool old_state = MessageLoop::current()->NestableTasksAllowed();
   MessageLoop::current()->SetNestableTasksAllowed(true);
   context_menu_->RunMenuAt(screen_point.x(), screen_point.y());
   MessageLoop::current()->SetNestableTasksAllowed(old_state);
 }
@@ skipping 100 matching lines @@
     tab_contents_->HideContents();
   }
 }
 
 void TabContentsViewViews::OnNativeWidgetSizeChanged(
     const gfx::Size& new_size) {
   if (overlaid_view_)
     overlaid_view_->SetBounds(gfx::Rect(new_size));
   views::Widget::OnNativeWidgetSizeChanged(new_size);
 }