Fire accessibility hover events when the touch exploration flag is set.

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.h

 /*
  * Copyright (C) 2014, 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 89 matching lines @@
     void handleScrollPositionChanged(LayoutObject*) override;
 
     // Called when scroll bars are added / removed (as the view resizes).
     void handleScrollbarUpdate(FrameView*) override;
     void handleLayoutComplete(LayoutObject*) override;
     void handleScrolledToAnchor(const Node* anchorNode) override;
 
     const AtomicString& computedRoleForNode(Node*) override;
     String computedNameForNode(Node*) override;
 
+    void onTouchAccessibilityHover(const IntPoint&) override;
+
     // Returns the root object for the entire document.
     AXObject* rootObject();
 
     AXObject* objectFromAXID(AXID id) const { return m_objects.get(id); }
     AXObject* root();
 
     // used for objects without backing elements
     AXObject* getOrCreate(AccessibilityRole);
     AXObject* getOrCreate(LayoutObject*);
     AXObject* getOrCreate(Widget*);
@@ skipping 132 matching lines @@
 // This is the only subclass of AXObjectCache.
 DEFINE_TYPE_CASTS(AXObjectCacheImpl, AXObjectCache, cache, true, true);
 
 bool nodeHasRole(Node*, const String& role);
 // This will let you know if aria-hidden was explicitly set to false.
 bool isNodeAriaVisible(Node*);
 
 }
 
 #endif