Make context menu aware of hidden selection

third_party/WebKit/Source/core/input/EventHandler.cpp

Index: third_party/WebKit/Source/core/input/EventHandler.cpp
diff --git a/third_party/WebKit/Source/core/input/EventHandler.cpp b/third_party/WebKit/Source/core/input/EventHandler.cpp
index cf17e1df8c3bfc2248839b3f49db5c00eb7de6c4..b370359ab3bf0239068c6a8ebe2af40b81af12f5 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.cpp
+++ b/third_party/WebKit/Source/core/input/EventHandler.cpp
@@ -1826,7 +1826,7 @@ WebInputEventResult EventHandler::SendContextMenuEventForKey(
       selection.ComputeVisibleSelectionInDOMTreeDeprecated().Start();
   VisualViewport& visual_viewport = frame_->GetPage()->GetVisualViewport();
 
-  if (!override_target_element && start.AnchorNode() &&
+  if (!override_target_element && start.AnchorNode() && !selection.IsHidden() &&

[hugoh_UTC2, 2017/05/12 10:11:25]

I'm wondering if we can't replace this complete statement with just:
if (!override_target_element && selection.SelectionHasFocus()) - but, it feels
risky to do that in this bugfix CL. I will test this locally.

       (selection.ComputeVisibleSelectionInDOMTreeDeprecated()
            .RootEditableElement() ||
        selection.ComputeVisibleSelectionInDOMTreeDeprecated().IsRange())) {