Stop supporting legacy keywords in Referrer-Policy header

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

Index: third_party/WebKit/Source/core/dom/ExecutionContext.h
diff --git a/third_party/WebKit/Source/core/dom/ExecutionContext.h b/third_party/WebKit/Source/core/dom/ExecutionContext.h
index 130ba2d60795231ebc979cc0bcd38af6fd54be84..38563a031a4d1e06a4af4ff9ba644bef3acd3caa 100644
--- a/third_party/WebKit/Source/core/dom/ExecutionContext.h
+++ b/third_party/WebKit/Source/core/dom/ExecutionContext.h
@@ -154,7 +154,11 @@ public:
     // the context's referrer policy to the last one that is a valid
     // policy. Logs a message to the console if none of the policy
     // tokens are valid policies.
-    void parseAndSetReferrerPolicy(const String& policies);
+    //
+    // If |supportLegacyKeywords| is true, then the legacy keywords
+    // "never", "default", "always", and "origin-when-crossorigin" are
+    // parsed as valid policies.
+    void parseAndSetReferrerPolicy(const String& policies, bool supportLegacyKeywords = false);
     void setReferrerPolicy(ReferrerPolicy);
     ReferrerPolicy getReferrerPolicy() const { return m_referrerPolicy; }