Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/modules/screen_orientation/ScreenOrientation.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/screen_orientation/ScreenOrientation.h"
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
@@ skipping 15 matching lines @@
 
 namespace blink {
 
 struct ScreenOrientationInfo {
     const AtomicString& name;
     unsigned orientation;
 };
 
 static ScreenOrientationInfo* orientationsMap(unsigned& length)
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, portraitPrimary, ("portrait-primary", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, portraitSecondary, ("portrait-secondary", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, landscapePrimary, ("landscape-primary", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, landscapeSecondary, ("landscape-secondary", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, any, ("any", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, portrait, ("portrait", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, landscape, ("landscape", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, natural, ("natural", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, portraitPrimary, ("portrait-primary"));
+    DEFINE_STATIC_LOCAL(const AtomicString, portraitSecondary, ("portrait-secondary"));
+    DEFINE_STATIC_LOCAL(const AtomicString, landscapePrimary, ("landscape-primary"));
+    DEFINE_STATIC_LOCAL(const AtomicString, landscapeSecondary, ("landscape-secondary"));
+    DEFINE_STATIC_LOCAL(const AtomicString, any, ("any"));
+    DEFINE_STATIC_LOCAL(const AtomicString, portrait, ("portrait"));
+    DEFINE_STATIC_LOCAL(const AtomicString, landscape, ("landscape"));
+    DEFINE_STATIC_LOCAL(const AtomicString, natural, ("natural"));
 
     static ScreenOrientationInfo orientationMap[] = {
         { portraitPrimary, WebScreenOrientationLockPortraitPrimary },
         { portraitSecondary, WebScreenOrientationLockPortraitSecondary },
         { landscapePrimary, WebScreenOrientationLockLandscapePrimary },
         { landscapeSecondary, WebScreenOrientationLockLandscapeSecondary },
         { any, WebScreenOrientationLockAny },
         { portrait, WebScreenOrientationLockPortrait },
         { landscape, WebScreenOrientationLockLandscape },
         { natural, WebScreenOrientationLockNatural }
@@ skipping 135 matching lines @@
     return ScreenOrientationController::from(*m_frame);
 }
 
 DEFINE_TRACE(ScreenOrientation)
 {
     RefCountedGarbageCollectedEventTargetWithInlineData<ScreenOrientation>::trace(visitor);
     DOMWindowProperty::trace(visitor);
 }
 
 } // namespace blink