Blur immediately if an attribute change made an element unfocasable.

third_party/WebKit/Source/core/svg/SVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009, 2014 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 197 matching lines @@
 
  protected:
   SVGElement(const QualifiedName&,
              Document&,
              ConstructionType = CreateSVGElement);
 
   void parseAttribute(const QualifiedName&,
                       const AtomicString&,
                       const AtomicString&) override;
 
-  void attributeChanged(
-      const QualifiedName&,
-      const AtomicString&,
-      const AtomicString&,
-      AttributeModificationReason = ModifiedDirectly) override;
+  void attributeChanged(const QualifiedName&,
+                        const AtomicString&,
+                        const AtomicString&,
+                        AttributeModificationReason) override;
 
   void collectStyleForPresentationAttribute(const QualifiedName&,
                                             const AtomicString&,
                                             MutableStylePropertySet*) override;
 
   InsertionNotificationRequest insertedInto(ContainerNode*) override;
   void removedFrom(ContainerNode*) override;
   void childrenChanged(const ChildrenChange&) override;
 
   static CSSPropertyID cssPropertyIdForSVGAttributeName(const QualifiedName&);
@@ skipping 104 matching lines @@
   inline bool isElementOfType<const thisType>(const SVGElement& element) { \
     return is##thisType(element);                                          \
   }                                                                        \
   DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 }  // namespace blink
 
 #include "core/SVGElementTypeHelpers.h"
 
 #endif  // SVGElement_h