Renamed `embedding-csp` HTTP request header to `required-csp`.

third_party/WebKit/Source/core/frame/csp/ContentSecurityPolicy.cpp

 /*
  * Copyright (C) 2011 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1666 matching lines @@
     return DirectiveType::kUpgradeInsecureRequests;
   if (name == "worker-src")
     return DirectiveType::kWorkerSrc;
 
   return DirectiveType::kUndefined;
 }
 
 bool ContentSecurityPolicy::Subsumes(const ContentSecurityPolicy& other) const {
   if (!policies_.size() || !other.policies_.size())
     return !policies_.size();
-  // Embedding-CSP must specify only one policy.
+  // Required-CSP must specify only one policy.
   if (policies_.size() != 1)
     return false;
 
   CSPDirectiveListVector other_vector;
   for (const auto& policy : other.policies_) {
     if (!policy->IsReportOnly())
       other_vector.push_back(policy);
   }
 
   return policies_[0]->Subsumes(other_vector);
 }
 
 bool ContentSecurityPolicy::ShouldBypassContentSecurityPolicy(
     const KURL& url,
     SchemeRegistry::PolicyAreas area) {
   if (SecurityOrigin::ShouldUseInnerURL(url)) {
     return SchemeRegistry::SchemeShouldBypassContentSecurityPolicy(
         SecurityOrigin::ExtractInnerURL(url).Protocol(), area);
   } else {
     return SchemeRegistry::SchemeShouldBypassContentSecurityPolicy(
         url.Protocol(), area);
   }
 }
 
 }  // namespace blink