Remove obviously unneeded forward declarations from headers under src/{app,base,net}.

net/base/transport_security_state.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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 NET_BASE_TRANSPORT_SECURITY_STATE_H_
 #define NET_BASE_TRANSPORT_SECURITY_STATE_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/lock.h"
 #include "base/ref_counted.h"
 #include "base/time.h"
 
-class GURL;
-
 namespace net {
 
 // TransportSecurityState
 //
 // Tracks which hosts have enabled *-Transport-Security. This object manages
 // the in-memory store. A separate object must register itself with this object
 // in order to persist the state to disk.
 class TransportSecurityState :
     public base::RefCountedThreadSafe<TransportSecurityState> {
  public:
@@ skipping 82 matching lines @@
   static std::string CanonicaliseHost(const std::string& host);
   static bool IsPreloadedSTS(const std::string& canonicalised_host,
                              bool* out_include_subdomains);
 
   DISALLOW_COPY_AND_ASSIGN(TransportSecurityState);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_TRANSPORT_SECURITY_STATE_H_