Remove CSSTouchAction runtime flag (status=stable)

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 3731 matching lines @@
         return action2;
     if (action2 == TouchActionAuto)
         return action1;
     if (!(action1 & action2))
         return TouchActionNone;
     return action1 & action2;
 }
 
 TouchAction EventHandler::computeEffectiveTouchAction(const Node& node)
 {
-    // Optimization to minimize risk of this new feature (behavior should be identical
-    // since there's no way to get non-default touch-action values).
-    if (!RuntimeEnabledFeatures::cssTouchActionEnabled())
-        return TouchActionAuto;
-
     // Start by permitting all actions, then walk the elements supporting
     // touch-action from the target node up to the nearest scrollable ancestor
     // and exclude any prohibited actions.
     TouchAction effectiveTouchAction = TouchActionAuto;
     for (const Node* curNode = &node; curNode; curNode = NodeRenderingTraversal::parent(curNode)) {
         if (RenderObject* renderer = curNode->renderer()) {
             if (renderer->supportsTouchAction()) {
                 TouchAction action = renderer->style()->touchAction();
                 effectiveTouchAction = intersectTouchAction(action, effectiveTouchAction);
                 if (effectiveTouchAction == TouchActionNone)
@@ skipping 86 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink