Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/dom/MutationRecord.cpp

Index: third_party/WebKit/Source/core/dom/MutationRecord.cpp
diff --git a/third_party/WebKit/Source/core/dom/MutationRecord.cpp b/third_party/WebKit/Source/core/dom/MutationRecord.cpp
index 386df23fa2496163fda993994ed91b9a3b13c9c0..a9968b29204d027c54df1df6e75f9f4d23db7c55 100644
--- a/third_party/WebKit/Source/core/dom/MutationRecord.cpp
+++ b/third_party/WebKit/Source/core/dom/MutationRecord.cpp
@@ -170,19 +170,19 @@ private:
 
 const AtomicString& ChildListRecord::type()
 {
-    DEFINE_STATIC_LOCAL(AtomicString, childList, ("childList", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, childList, ("childList"));
     return childList;
 }
 
 const AtomicString& AttributesRecord::type()
 {
-    DEFINE_STATIC_LOCAL(AtomicString, attributes, ("attributes", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, attributes, ("attributes"));
     return attributes;
 }
 
 const AtomicString& CharacterDataRecord::type()
 {
-    DEFINE_STATIC_LOCAL(AtomicString, characterData, ("characterData", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, characterData, ("characterData"));
     return characterData;
 }