Remove the blocking touch handlers for the input[type=range] and add touch-action instead

third_party/WebKit/Source/core/html/HTMLInputElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 269 matching lines @@
 private:
     enum AutoCompleteSetting { Uninitialized, On, Off };
 
     void didAddUserAgentShadowRoot(ShadowRoot&) final;
 
     void willChangeForm() final;
     void didChangeForm() final;
     InsertionNotificationRequest insertedInto(ContainerNode*) override;
     void removedFrom(ContainerNode*) final;
     void didMoveToNewDocument(Document& oldDocument) final;
-    void removeAllEventListeners() final;
 
     bool hasCustomFocusLogic() const final;
     bool isKeyboardFocusable() const final;
     bool shouldShowFocusRingOnMouseFocus() const final;
     bool isEnumeratable() const final;
     bool isInteractiveContent() const final;
     bool supportLabels() const final;
     bool matchesDefaultPseudoClass() const override;
 
     bool isTextFormControl() const final { return isTextField(); }
@@ skipping 49 matching lines @@
     void dispatchFocusInEvent(const AtomicString& eventType, Element* oldFocusedElement, WebFocusType, InputDeviceCapabilities* sourceCapabilities) final;
     bool supportsAutocapitalize() const final;
     const AtomicString& defaultAutocapitalize() const final;
 
     bool isOptionalFormControl() const final { return !isRequiredFormControl(); }
     bool isRequiredFormControl() const final;
     bool recalcWillValidate() const final;
     void requiredAttributeChanged() final;
     void disabledAttributeChanged() final;
 
-    void updateTouchEventHandlerRegistry();
     void initializeTypeInParsing();
     void updateType();
 
     void subtreeHasChanged() final;
 
     void setListAttributeTargetObserver(ListAttributeTargetObserver*);
     void resetListAttributeTargetObserver();
     void parseMaxLengthAttribute(const AtomicString&);
     void parseMinLengthAttribute(const AtomicString&);
     void updateValueIfNeeded();
@@ skipping 17 matching lines @@
     // https://html.spec.whatwg.org/multipage/forms.html#concept-input-checked-dirty-flag
     unsigned m_dirtyCheckedness : 1;
     unsigned m_isIndeterminate : 1;
     unsigned m_isActivatedSubmit : 1;
     unsigned m_autocomplete : 2; // AutoCompleteSetting
     unsigned m_hasNonEmptyList : 1;
     unsigned m_stateRestored : 1;
     unsigned m_parsingInProgress : 1;
     unsigned m_valueAttributeWasUpdatedAfterParsing : 1;
     unsigned m_canReceiveDroppedFiles : 1;
-    unsigned m_hasTouchEventHandler : 1;
     unsigned m_shouldRevealPassword : 1;
     unsigned m_needsToUpdateViewValue : 1;
     unsigned m_isPlaceholderVisible : 1;
     Member<InputType> m_inputType;
     Member<InputTypeView> m_inputTypeView;
     // The ImageLoader must be owned by this element because the loader code assumes
     // that it lives as long as its owning element lives. If we move the loader into
     // the ImageInput object we may delete the loader while this element lives on.
     Member<HTMLImageLoader> m_imageLoader;
     Member<ListAttributeTargetObserver> m_listAttributeTargetObserver;
 };
 
 } // namespace blink
 
 #endif // HTMLInputElement_h