Move parsing of referrer policy header values to SecurityPolicy

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

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2012 Google 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 175 matching lines @@
   String unusedErrorMessage;
   return isSecureContext(unusedErrorMessage, privilegeContextCheck);
 }
 
 String ExecutionContext::outgoingReferrer() const {
   return url().strippedForUseAsReferrer();
 }
 
 void ExecutionContext::parseAndSetReferrerPolicy(const String& policies,
                                                  bool supportLegacyKeywords) {
-  ReferrerPolicy referrerPolicy = ReferrerPolicyDefault;
+  ReferrerPolicy referrerPolicy;
 
-  Vector<String> tokens;
-  policies.split(',', true, tokens);
-  for (const auto& token : tokens) {
-    ReferrerPolicy currentResult;
-    if ((supportLegacyKeywords
-             ? SecurityPolicy::referrerPolicyFromStringWithLegacyKeywords(
-                   token, &currentResult)
-             : SecurityPolicy::referrerPolicyFromString(token,
-                                                        &currentResult))) {
-      referrerPolicy = currentResult;
-    }
-  }
-
-  if (referrerPolicy == ReferrerPolicyDefault) {
+  if (!SecurityPolicy::referrerPolicyFromHeaderValue(
+          policies,
+          supportLegacyKeywords ? SupportReferrerPolicyLegacyKeywords
+                                : DoNotSupportReferrerPolicyLegacyKeywords,
+          &referrerPolicy)) {
     addConsoleMessage(ConsoleMessage::create(
         RenderingMessageSource, ErrorMessageLevel,
         "Failed to set referrer policy: The value '" + policies +
             "' is not one of " +
             (supportLegacyKeywords
                  ? "'always', 'default', 'never', 'origin-when-crossorigin', "
                  : "") +
             "'no-referrer', 'no-referrer-when-downgrade', 'origin', "
             "'origin-when-cross-origin', or 'unsafe-url'. The referrer policy "
             "has been left unchanged."));
@@ skipping 18 matching lines @@
 }
 
 DEFINE_TRACE(ExecutionContext) {
   visitor->trace(m_publicURLManager);
   visitor->trace(m_pendingExceptions);
   ContextLifecycleNotifier::trace(visitor);
   Supplementable<ExecutionContext>::trace(visitor);
 }
 
 }  // namespace blink