Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp

 /*
  * Copyright (C) 2005, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov
  *
  * 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.
@@ skipping 138 matching lines @@
     }
 
 #if OS(MACOSX)
     // We are preserving this ascent hack to match Safari's ascent adjustment
     // in their SimpleFontDataMac.mm, for details see crbug.com/445830.
     // We need to adjust Times, Helvetica, and Courier to closely match the
     // vertical metrics of their Microsoft counterparts that are the de facto
     // web standard. The AppKit adjustment of 20% is too big and is
     // incorrectly added to line spacing, so we use a 15% adjustment instead
     // and add it to the ascent.
-    DEFINE_STATIC_LOCAL(AtomicString, timesName, ("Times", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(AtomicString, helveticaName, ("Helvetica", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(AtomicString, courierName, ("Courier", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, timesName, ("Times"));
+    DEFINE_STATIC_LOCAL(AtomicString, helveticaName, ("Helvetica"));
+    DEFINE_STATIC_LOCAL(AtomicString, courierName, ("Courier"));
     String familyName = m_platformData.fontFamilyName();
     if (familyName == timesName || familyName == helveticaName || familyName == courierName)
         ascent += floorf(((ascent + descent) * 0.15f) + 0.5f);
 #endif
 
     m_fontMetrics.setAscent(ascent);
     m_fontMetrics.setDescent(descent);
 
     float xHeight;
     if (metrics.fXHeight) {
@@ skipping 275 matching lines @@
         if (glyphs[i]) {
             pageToFill->setGlyphDataForIndex(offset + i, glyphs[i], this);
             haveGlyphs = true;
         }
     }
 
     return haveGlyphs;
 }
 
 } // namespace blink