Send mouse events for disabled form controls.

third_party/WebKit/Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 2081 matching lines @@
       for (auto& registration : *transient_registry)
         registration->ObservedSubtreeNodeWillDetach(*this);
     }
   }
 }
 
 void Node::HandleLocalEvents(Event& event) {
   if (!HasEventTargetData())
     return;
 
-  if (IsDisabledFormControl(this) && event.IsMouseEvent()) {
+  if (IsDisabledFormControl(this) && event.IsMouseEvent() &&
+      !RuntimeEnabledFeatures::sendMouseEventsDisabledFormControlsEnabled()) {
     UseCounter::Count(GetDocument(),
                       UseCounter::kDispatchMouseEventOnDisabledFormControl);
     return;
   }
 
   FireEventListeners(&event);
 }
 
 void Node::DispatchScopedEvent(Event* event) {
   event->SetTrusted(true);
@@ skipping 454 matching lines @@
   if (node) {
     std::stringstream stream;
     node->PrintNodePathTo(stream);
     LOG(INFO) << stream.str();
   } else {
     LOG(INFO) << "Cannot showNodePath for <null>";
   }
 }
 
 #endif