HSTS: add net-internals UI.

net/base/transport_security_state.h

Index: net/base/transport_security_state.h
diff --git a/net/base/transport_security_state.h b/net/base/transport_security_state.h
index 768ccbbc7c57774e405c524c52628c7143aec79d..a0c5a9f87cf878a0d1651c69e7a9827345ac25df 100644
--- a/net/base/transport_security_state.h
+++ b/net/base/transport_security_state.h
@@ -47,17 +47,26 @@ class TransportSecurityState :
     DomainState()
         : mode(MODE_STRICT),
           created(base::Time::Now()),
-          include_subdomains(false) { }
+          include_subdomains(false),
+          preloaded(false) { }
 
     Mode mode;
     base::Time created;  // when this host entry was first created
     base::Time expiry;  // the absolute time (UTC) when this record expires
     bool include_subdomains;  // subdomains included?
+
+    // The follow members are not valid when stored in _enabled_hosts.
+    bool preloaded;  // is this a preloaded entry?
+    std::string domain;  // the domain which matched
   };
 
   // Enable TransportSecurity for |host|.
   void EnableHost(const std::string& host, const DomainState& state);
 
+  // Delete any entry for |host|. If |host| doesn't have an exact entry then no
+  // action is taken. Returns true iff an entry was deleted.
+  bool DeleteHost(const std::string& host);
+
   // Returns true if |host| has TransportSecurity enabled. If that case,
   // *result is filled out.
   bool IsEnabledForHost(DomainState* result, const std::string& host);