Simplify TouchAction enum to be a simple bit flag

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2827 matching lines @@
     element->document().updateLayoutIgnorePendingStylesheets();
 
     bool zoomInToLegibleScale = m_webSettings->autoZoomFocusedNodeToLegibleScale()
         && !page()->frameHost().visualViewport().shouldDisableDesktopWorkarounds();
 
     if (zoomInToLegibleScale) {
         // When deciding whether to zoom in on a focused text box, we should decide not to
         // zoom in if the user won't be able to zoom out. e.g if the textbox is within a
         // touch-action: none container the user can't zoom back out.
         TouchAction action = TouchActionUtil::computeEffectiveTouchAction(*element);
-        if (action != TouchActionAuto && !(action & TouchActionPinchZoom))
+        if (!(action & TouchActionPinchZoom))
             zoomInToLegibleScale = false;
     }
 
     float scale;
     IntPoint scroll;
     bool needAnimation;
     computeScaleAndScrollForFocusedNode(element, zoomInToLegibleScale, scale, scroll, needAnimation);
     if (needAnimation)
         return startPageScaleAnimation(scroll, false, scale, scrollAndScaleAnimationDurationInSeconds);
 
@@ skipping 1572 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink