Revert of Disable hover state change for touch event on page with viewport meta and mobile.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 6532 matching lines @@
   // Now set the active state for our new object up to the root.
   for (Element* curr = new_element; curr;
        curr = FlatTreeTraversal::ParentElement(*curr)) {
     if (!must_be_in_active_chain || curr->InActiveChain())
       curr->SetActive(true);
   }
 }
 
 void Document::UpdateHoverState(const HitTestRequest& request,
                                 Element* inner_element_in_document) {
-  // Do not set hover state if event is from touch and on mobile.
-  bool allow_hover_changes =
-      !(request.TouchEvent() && GetPage() &&
-        GetPage()->GetVisualViewport().ShouldDisableDesktopWorkarounds());
-
   Element* old_hover_element = HoverElement();
 
   // The passed in innerElement may not be a result of a hit test for the
   // current up-to-date flat/layout tree. That means the element may be
   // display:none at this point. Skip up the ancestor chain until we reach an
   // element with a layoutObject or a display:contents element.
   Element* new_hover_element =
       SkipDisplayNoneAncestors(inner_element_in_document);
 
   // Update our current hover element.
-  if (allow_hover_changes)
-    SetHoverElement(new_hover_element);
+  SetHoverElement(new_hover_element);
 
-  if (old_hover_element == new_hover_element || !allow_hover_changes)
+  if (old_hover_element == new_hover_element)
     return;
 
   Node* ancestor_element = nullptr;
   if (old_hover_element && old_hover_element->isConnected() &&
       new_hover_element) {
     Node* ancestor = FlatTreeTraversal::CommonAncestor(*old_hover_element,
                                                        *new_hover_element);
     if (ancestor && ancestor->IsElementNode())
       ancestor_element = ToElement(ancestor);
   }
@@ skipping 391 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (blink::Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->Url().GetString().Utf8().data());
 }
 #endif