Context menus only opens if the mouse are released in the same view as it was...

chrome/views/view.cc

 // Copyright (c) 2006-2008 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/views/view.h"
 
 #include <algorithm>
 
 #ifndef NDEBUG
 #include <iostream>
@@ skipping 481 matching lines @@
   }
   // WARNING: we may have been deleted.
   return (context_menu_controller != NULL) || possible_drag;
 }
 
 void View::ProcessMouseReleased(const MouseEvent& e, bool canceled) {
   if (!canceled && context_menu_controller_ && e.IsOnlyRightMouseButton()) {
     // Assume that if there is a context menu controller we won't be deleted
     // from mouse released.
     gfx::Point location(e.location());
-    ConvertPointToScreen(this, &location);
     OnMouseReleased(e, canceled);
-    ShowContextMenu(location.x(), location.y(), true);
+    if (HitTest(location)) {
+      ConvertPointToScreen(this, &location);
+      ShowContextMenu(location.x(), location.y(), true);
+    }
   } else {
     OnMouseReleased(e, canceled);
   }
   // WARNING: we may have been deleted.
 }
 
 void View::AddChildView(View* v) {
   AddChildView(static_cast<int>(child_views_.size()), v, false);
 }
 
@@ skipping 1095 matching lines @@
   start_x = start_y = 0;
 }
 
 void View::DragInfo::PossibleDrag(int x, int y) {
   possible_drag = true;
   start_x = x;
   start_y = y;
 }
 
 }  // namespace