Embedding-CSP: Adding `const` to method signatures.

third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSPDirectiveList_h
 #define CSPDirectiveList_h
 
 #include "core/fetch/Resource.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/frame/csp/MediaListDirective.h"
@@ skipping 255 matching lines @@
   bool checkAncestorsAndReportViolation(SourceListDirective*,
                                         LocalFrame*,
                                         const KURL&) const;
   bool checkRequestWithoutIntegrityAndReportViolation(
       WebURLRequest::RequestContext,
       const KURL&,
       ResourceRequest::RedirectStatus) const;
 
   bool denyIfEnforcingPolicy() const { return isReportOnly(); }
 
-  // Tthis function returns a SourceListDirective of a given type
+  // This function returns a SourceListDirective of a given type
   // or if it is not defined, the default SourceListDirective for that type.
   SourceListDirective* operativeDirective(
-      const ContentSecurityPolicy::DirectiveType&);
+      const ContentSecurityPolicy::DirectiveType&) const;
 
   // This function aggregates from a vector of policies all operative
   // SourceListDirectives of a given type into a vector.
   static SourceListDirectiveVector getSourceVector(
       const ContentSecurityPolicy::DirectiveType&,
       const CSPDirectiveListVector& policies);
 
   Member<ContentSecurityPolicy> m_policy;
 
   String m_header;
@@ skipping 27 matching lines @@
   uint8_t m_requireSRIFor;
 
   Vector<String> m_reportEndpoints;
 
   String m_evalDisabledErrorMessage;
 };
 
 }  // namespace blink
 
 #endif