Updating href attribute should not blur.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 238 matching lines @@
     return;
 
   ContainerNode::setActive(down);
 }
 
 void HTMLAnchorElement::attributeChanged(
     const AttributeModificationParams& params) {
   HTMLElement::attributeChanged(params);
   if (params.reason != AttributeModificationReason::kDirectly)
     return;
-  if (params.name != hrefAttr && isLink())
+  if (params.name != hrefAttr)
     return;
-  if (adjustedFocusedElementInTreeScope() != this)
-    return;
-  blur();
+  if (!isLink() && adjustedFocusedElementInTreeScope() == this)
+    blur();
 }
 
 void HTMLAnchorElement::parseAttribute(
     const AttributeModificationParams& params) {
   if (params.name == hrefAttr) {
     bool wasLink = isLink();
     setIsLink(!params.newValue.isNull());
     if (wasLink || isLink()) {
       pseudoStateChanged(CSSSelector::PseudoLink);
       pseudoStateChanged(CSSSelector::PseudoVisited);
@@ skipping 207 matching lines @@
 }
 
 HTMLAnchorElement::NavigationHintSender*
 HTMLAnchorElement::ensureNavigationHintSender() {
   if (!m_navigationHintSender)
     m_navigationHintSender = NavigationHintSender::create(this);
   return m_navigationHintSender;
 }
 
 }  // namespace blink