Upgrade insecure requests: Pipe navigational hosts down into nested documents.

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 158 matching lines @@
     // flags, then dump all the parsing error messages, then poke at histograms.
     if (Document* document = this->document()) {
         if (m_sandboxMask != SandboxNone) {
             UseCounter::count(document, UseCounter::SandboxViaCSP);
             document->enforceSandboxFlags(m_sandboxMask);
         }
         if (m_enforceStrictMixedContentChecking)
             document->enforceStrictMixedContentChecking();
         if (didSetReferrerPolicy())
             document->setReferrerPolicy(m_referrerPolicy);
-        if (m_insecureRequestsPolicy > document->insecureRequestsPolicy())
+        if (m_insecureRequestsPolicy > document->insecureRequestsPolicy()) {
             document->setInsecureRequestsPolicy(m_insecureRequestsPolicy);
+            document->addInsecureNavigationUpgrade(securityOrigin()->host().impl()->hash());
+        }
 
         for (const auto& consoleMessage : m_consoleMessages)
             m_executionContext->addConsoleMessage(consoleMessage);
         m_consoleMessages.clear();
 
         for (const auto& policy : m_policies)
             UseCounter::count(*document, getUseCounterType(policy->headerType()));
     }
 
     // We disable 'eval()' even in the case of report-only policies, and rely on the check in the
@@ skipping 727 matching lines @@
     // Collisions have no security impact, so we can save space by storing only the string's hash rather than the whole report.
     return !m_violationReportsSent.contains(report.impl()->hash());
 }
 
 void ContentSecurityPolicy::didSendViolationReport(const String& report)
 {
     m_violationReportsSent.add(report.impl()->hash());
 }
 
 } // namespace blink