Revert of "Speculatively launch Service Workers on mouse/touch events."

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 70 matching lines @@
   bool willRespondToMouseClickEvents() final;
 
   bool hasRel(uint32_t relation) const;
   void setRel(const AtomicString&);
 
   LinkHash visitedLinkHash() const;
   void invalidateCachedVisitedLinkHash() { m_cachedVisitedLinkHash = 0; }
 
   void sendPings(const KURL& destinationURL) const;
 
-  DECLARE_VIRTUAL_TRACE();
-
  protected:
   HTMLAnchorElement(const QualifiedName&, Document&);
 
   void parseAttribute(const AttributeModificationParams&) override;
   bool supportsFocus() const override;
   bool matchesEnabledPseudoClass() const override;
 
  private:
-  class NavigationHintSender;
-
   void attributeChanged(const AttributeModificationParams&) override;
   bool shouldHaveFocusAppearance() const final;
   void dispatchFocusEvent(Element* oldFocusedElement,
                           WebFocusType,
                           InputDeviceCapabilities* sourceCapabilities) override;
   void dispatchBlurEvent(Element* newFocusedElement,
                          WebFocusType,
                          InputDeviceCapabilities* sourceCapabilities) override;
   bool isMouseFocusable() const override;
   bool isKeyboardFocusable() const override;
   void defaultEventHandler(Event*) final;
   void setActive(bool = true) final;
   void accessKeyAction(bool sendMouseEvents) final;
   bool isURLAttribute(const Attribute&) const final;
   bool hasLegalLinkAttribute(const QualifiedName&) const final;
   bool canStartSelection() const final;
   int tabIndex() const final;
   bool draggable() const final;
   bool isInteractiveContent() const final;
   InsertionNotificationRequest insertedInto(ContainerNode*) override;
   void handleClick(Event*);
-  NavigationHintSender* ensureNavigationHintSender();
 
   uint32_t m_linkRelations;
   mutable LinkHash m_cachedVisitedLinkHash;
   bool m_wasFocusedByMouse;
-  Member<NavigationHintSender> m_navigationHintSender;
 };
 
 inline LinkHash HTMLAnchorElement::visitedLinkHash() const {
   if (!m_cachedVisitedLinkHash)
     m_cachedVisitedLinkHash = blink::visitedLinkHash(
         document().baseURL(), fastGetAttribute(HTMLNames::hrefAttr));
   return m_cachedVisitedLinkHash;
 }
 
 // Functions shared with the other anchor elements (i.e., SVG).
 
 bool isEnterKeyKeydownEvent(Event*);
 bool isLinkClick(Event*);
 
 }  // namespace blink
 
 #endif  // HTMLAnchorElement_h