Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/track/TextTrackCue.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2012, 2013 Apple 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 29 matching lines @@
 namespace blink {
 
 class TextTrack;
 
 class TextTrackCue : public RefCountedGarbageCollectedEventTargetWithInlineData<TextTrackCue> {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(TextTrackCue);
 public:
     static const AtomicString& cueShadowPseudoId()
     {
-        DEFINE_STATIC_LOCAL(const AtomicString, cue, ("cue", AtomicString::ConstructFromLiteral));
+        DEFINE_STATIC_LOCAL(const AtomicString, cue, ("cue"));
         return cue;
     }
 
     ~TextTrackCue() override { }
 
     TextTrack* track() const;
     void setTrack(TextTrack*);
 
     Node* owner() const;
 
@@ skipping 59 matching lines @@
 
     unsigned m_cueIndex;
 
     bool m_isActive : 1;
     bool m_pauseOnExit : 1;
 };
 
 } // namespace blink
 
 #endif // TextTrackCue_h