GTTF: Add missing virtual destructors.

net/http/http_pipelined_host.h

 // Copyright (c) 2012 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_HTTP_HTTP_PIPELINED_HOST_H_
 #define NET_HTTP_HTTP_PIPELINED_HOST_H_
 
 #include "net/base/host_port_pair.h"
 #include "net/base/net_export.h"
 #include "net/http/http_pipelined_connection.h"
@@ skipping 37 matching lines @@
     virtual void OnHostIdle(HttpPipelinedHost* host) = 0;
 
     // Called when a pipelined host has newly available pipeline capacity, like
     // when a request completes.
     virtual void OnHostHasAdditionalCapacity(HttpPipelinedHost* host) = 0;
 
     // Called when a host determines if pipelining can be used.
     virtual void OnHostDeterminedCapability(
         HttpPipelinedHost* host,
         HttpPipelinedHostCapability capability) = 0;
+
+   protected:
+    virtual ~Delegate() {}
   };
 
   class Factory {
    public:
     virtual ~Factory() {}
 
     // Returns a new HttpPipelinedHost.
     virtual HttpPipelinedHost* CreateNewHost(
         Delegate* delegate, const Key& key,
         HttpPipelinedConnection::Factory* factory,
@@ skipping 25 matching lines @@
   virtual const Key& GetKey() const = 0;
 
   // Creates a Value summary of this host's pipelines. Caller assumes
   // ownership of the returned Value.
   virtual base::Value* PipelineInfoToValue() const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PIPELINED_HOST_H_