Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/platform/network/ResourceResponse.cpp

Index: third_party/WebKit/Source/platform/network/ResourceResponse.cpp
diff --git a/third_party/WebKit/Source/platform/network/ResourceResponse.cpp b/third_party/WebKit/Source/platform/network/ResourceResponse.cpp
index de8054a76bad978caa3786cc63b0d4a03cc1378d..7a8acbfd086474348ba95ae9981686c0fd49e355 100644
--- a/third_party/WebKit/Source/platform/network/ResourceResponse.cpp
+++ b/third_party/WebKit/Source/platform/network/ResourceResponse.cpp
@@ -293,22 +293,22 @@ const AtomicString& ResourceResponse::httpHeaderField(const AtomicString& name)
 
 static const AtomicString& cacheControlHeaderString()
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, cacheControlHeader, ("cache-control", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, cacheControlHeader, ("cache-control"));
     return cacheControlHeader;
 }
 
 static const AtomicString& pragmaHeaderString()
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, pragmaHeader, ("pragma", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, pragmaHeader, ("pragma"));
     return pragmaHeader;
 }
 
 void ResourceResponse::updateHeaderParsedState(const AtomicString& name)
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, ageHeader, ("age", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, dateHeader, ("date", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, expiresHeader, ("expires", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, lastModifiedHeader, ("last-modified", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, ageHeader, ("age"));
+    DEFINE_STATIC_LOCAL(const AtomicString, dateHeader, ("date"));
+    DEFINE_STATIC_LOCAL(const AtomicString, expiresHeader, ("expires"));
+    DEFINE_STATIC_LOCAL(const AtomicString, lastModifiedHeader, ("last-modified"));
 
     if (equalIgnoringCase(name, ageHeader))
         m_haveParsedAgeHeader = false;
@@ -383,8 +383,8 @@ bool ResourceResponse::cacheControlContainsMustRevalidate()
 
 bool ResourceResponse::hasCacheValidatorFields() const
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, lastModifiedHeader, ("last-modified", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, eTagHeader, ("etag", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, lastModifiedHeader, ("last-modified"));
+    DEFINE_STATIC_LOCAL(const AtomicString, eTagHeader, ("etag"));
     return !m_httpHeaderFields.get(lastModifiedHeader).isEmpty() || !m_httpHeaderFields.get(eTagHeader).isEmpty();
 }
 
@@ -420,7 +420,7 @@ static double parseDateValueInHeader(const HTTPHeaderMap& headers, const AtomicS
 double ResourceResponse::date() const
 {
     if (!m_haveParsedDateHeader) {
-        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("date", AtomicString::ConstructFromLiteral));
+        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("date"));
         m_date = parseDateValueInHeader(m_httpHeaderFields, headerName);
         m_haveParsedDateHeader = true;
     }
@@ -430,7 +430,7 @@ double ResourceResponse::date() const
 double ResourceResponse::age() const
 {
     if (!m_haveParsedAgeHeader) {
-        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("age", AtomicString::ConstructFromLiteral));
+        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("age"));
         const AtomicString& headerValue = m_httpHeaderFields.get(headerName);
         bool ok;
         m_age = headerValue.toDouble(&ok);
@@ -444,7 +444,7 @@ double ResourceResponse::age() const
 double ResourceResponse::expires() const
 {
     if (!m_haveParsedExpiresHeader) {
-        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("expires", AtomicString::ConstructFromLiteral));
+        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("expires"));
         m_expires = parseDateValueInHeader(m_httpHeaderFields, headerName);
         m_haveParsedExpiresHeader = true;
     }
@@ -454,7 +454,7 @@ double ResourceResponse::expires() const
 double ResourceResponse::lastModified() const
 {
     if (!m_haveParsedLastModifiedHeader) {
-        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("last-modified", AtomicString::ConstructFromLiteral));
+        DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("last-modified"));
         m_lastModified = parseDateValueInHeader(m_httpHeaderFields, headerName);
         m_haveParsedLastModifiedHeader = true;
     }
@@ -463,13 +463,13 @@ double ResourceResponse::lastModified() const
 
 bool ResourceResponse::isAttachment() const
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("content-disposition", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, headerName, ("content-disposition"));
     String value = m_httpHeaderFields.get(headerName);
     size_t loc = value.find(';');
     if (loc != kNotFound)
         value = value.left(loc);
     value = value.stripWhiteSpace();
-    DEFINE_STATIC_LOCAL(const AtomicString, attachmentString, ("attachment", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, attachmentString, ("attachment"));
     return equalIgnoringCase(value, attachmentString);
 }