Expose Cache Storage API in global window/worker scope

Source/platform/weborigin/SecurityOrigin.h

 /*
  * Copyright (C) 2007, 2008 Apple 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 131 matching lines @@
     //
     // WARNING: This is an extremely powerful ability. Use with caution!
     void grantUniversalAccess();
 
     bool canAccessDatabase() const { return !isUnique(); };
     bool canAccessLocalStorage() const { return !isUnique(); };
     bool canAccessSharedWorkers() const { return !isUnique(); }
     bool canAccessCookies() const { return !isUnique(); }
     bool canAccessPasswordManager() const { return !isUnique(); }
     bool canAccessFileSystem() const { return !isUnique(); }
+    bool canAccessCacheStorage() const { return !isUnique(); };
     Policy canShowNotifications() const;
 
     // Technically, we should always allow access to sessionStorage, but we
     // currently don't handle creating a sessionStorage area for unique
     // origins.
     bool canAccessSessionStorage() const { return !isUnique(); }
 
     // The local SecurityOrigin is the most privileged SecurityOrigin.
     // The local SecurityOrigin can script any document, navigate to local
     // resources, and can set arbitrary headers on XMLHttpRequests.
@@ skipping 70 matching lines @@
     bool m_universalAccess;
     bool m_domainWasSetInDOM;
     bool m_canLoadLocalResources;
     bool m_enforceFilePathSeparation;
     bool m_needsDatabaseIdentifierQuirkForFiles;
 };
 
 } // namespace blink
 
 #endif // SecurityOrigin_h