Remove use of WebCrypto digestSynchronous in Blink.

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 309 matching lines @@
     if (hashAlgorithmsUsed == ContentSecurityPolicyHashAlgorithmNone)
         return false;
 
     StringUTF8Adaptor normalizedSource(source, StringUTF8Adaptor::Normalize, WTF::EntitiesForUnencodables);
 
     // See comment in CSPSourceList::parseHash about why we are using this sizeof
     // calculation instead of WTF_ARRAY_LENGTH.
     for (size_t i = 0; i < (sizeof(kAlgorithmMap) / sizeof(kAlgorithmMap[0])); i++) {
         DigestValue digest;
         if (kAlgorithmMap[i].cspHashAlgorithm & hashAlgorithmsUsed) {
-            computeDigest(kAlgorithmMap[i].algorithm, normalizedSource.data(), normalizedSource.length(), digest);
-            if (isAllowedByAllWithHash<allowed>(policies, CSPHashValue(kAlgorithmMap[i].cspHashAlgorithm, digest)))
+            bool digestSuccess = computeDigest(kAlgorithmMap[i].algorithm, normalizedSource.data(), normalizedSource.length(), digest);
+            if (digestSuccess && isAllowedByAllWithHash<allowed>(policies, CSPHashValue(kAlgorithmMap[i].cspHashAlgorithm, digest)))
                 return true;
         }
     }
 
     return false;
 }
 
 bool ContentSecurityPolicy::allowJavaScriptURLs(const String& contextURL, const WTF::OrdinalNumber& contextLine, ContentSecurityPolicy::ReportingStatus reportingStatus) const
 {
     return isAllowedByAllWithContext<&CSPDirectiveList::allowJavaScriptURLs>(m_policies, contextURL, contextLine, reportingStatus);
@@ skipping 435 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 WebCore