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

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * 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.
@@ skipping 568 matching lines @@
       !GetFrameLoader().RequiredCSP().IsEmpty()) {
     SecurityOrigin* parent_security_origin =
         frame_->Tree().Parent()->GetSecurityContext()->GetSecurityOrigin();
     if (ContentSecurityPolicy::ShouldEnforceEmbeddersPolicy(
             response, parent_security_origin)) {
       content_security_policy_->AddPolicyFromHeaderValue(
           GetFrameLoader().RequiredCSP(),
           kContentSecurityPolicyHeaderTypeEnforce,
           kContentSecurityPolicyHeaderSourceHTTP);
     } else {
-      ContentSecurityPolicy* embedding_csp = ContentSecurityPolicy::Create();
-      embedding_csp->AddPolicyFromHeaderValue(
+      ContentSecurityPolicy* required_csp = ContentSecurityPolicy::Create();
+      required_csp->AddPolicyFromHeaderValue(
           GetFrameLoader().RequiredCSP(),
           kContentSecurityPolicyHeaderTypeEnforce,
           kContentSecurityPolicyHeaderSourceHTTP);
-      if (!embedding_csp->Subsumes(*content_security_policy_)) {
+      if (!required_csp->Subsumes(*content_security_policy_)) {
         String message = "Refused to display '" +
                          response.Url().ElidedString() +
                          "' because it has not opted-into the following policy "
                          "required by its embedder: '" +
                          GetFrameLoader().RequiredCSP() + "'.";
         ConsoleMessage* console_message = ConsoleMessage::CreateForRequest(
             kSecurityMessageSource, kErrorMessageLevel, message, response.Url(),
             MainResourceIdentifier());
         frame_->GetDocument()->AddConsoleMessage(console_message);
         CancelLoadAfterCSPDenied(response);
@@ skipping 498 matching lines @@
                      InstallNewDocumentReason::kJavascriptURL,
                      kForceSynchronousParsing, KURL());
   if (!source.IsNull())
     writer_->AppendReplacingData(source);
   EndWriting();
 }
 
 DEFINE_WEAK_IDENTIFIER_MAP(DocumentLoader);
 
 }  // namespace blink