Make ResourceResponse's cached CacheControlHeader mutable.

third_party/WebKit/Source/platform/network/ResourceResponse.h

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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
@@ skipping 120 matching lines @@
 
     bool isAttachment() const;
 
     // FIXME: These are used by PluginStream on some platforms. Calculations may differ from just returning plain Last-Modified header.
     // Leaving it for now but this should go away in favor of generic solution.
     void setLastModifiedDate(time_t);
     time_t lastModifiedDate() const;
 
     // These functions return parsed values of the corresponding response headers.
     // NaN means that the header was not present or had invalid value.
-    bool cacheControlContainsNoCache();
-    bool cacheControlContainsNoStore();
-    bool cacheControlContainsMustRevalidate();
+    bool cacheControlContainsNoCache() const;
+    bool cacheControlContainsNoStore() const;
+    bool cacheControlContainsMustRevalidate() const;
     bool hasCacheValidatorFields() const;
-    double cacheControlMaxAge();
-    double cacheControlStaleWhileRevalidate();
+    double cacheControlMaxAge() const;
+    double cacheControlStaleWhileRevalidate() const;
     double date() const;
     double age() const;
     double expires() const;
     double lastModified() const;
 
     unsigned connectionID() const;
     void setConnectionID(unsigned);
 
     bool connectionReused() const;
     void setConnectionReused(bool);
@@ skipping 107 matching lines @@
     HTTPHeaderMap m_httpHeaderFields;
     time_t m_lastModifiedDate;
     bool m_wasCached : 1;
     unsigned m_connectionID;
     bool m_connectionReused : 1;
     RefPtr<ResourceLoadTiming> m_resourceLoadTiming;
     RefPtr<ResourceLoadInfo> m_resourceLoadInfo;
 
     bool m_isNull : 1;
 
-    CacheControlHeader m_cacheControlHeader;
+    mutable CacheControlHeader m_cacheControlHeader;
 
     mutable bool m_haveParsedAgeHeader : 1;
     mutable bool m_haveParsedDateHeader : 1;
     mutable bool m_haveParsedExpiresHeader : 1;
     mutable bool m_haveParsedLastModifiedHeader : 1;
 
     mutable double m_age;
     mutable double m_date;
     mutable double m_expires;
     mutable double m_lastModified;
@@ skipping 119 matching lines @@
     int64_t m_responseTime;
     String m_remoteIPAddress;
     unsigned short m_remotePort;
     String m_downloadedFilePath;
     RefPtr<BlobDataHandle> m_downloadedFileHandle;
 };
 
 } // namespace blink
 
 #endif // ResourceResponse_h