RefCounted types should not have public destructors, content/browser part 2

content/renderer/plugin_channel_host.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "content/renderer/plugin_channel_host.h"
 
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "content/common/child_process.h"
 #include "content/common/npobject_base.h"
 #include "content/common/plugin_messages.h"
@@ skipping 10 matching lines @@
  public:
   IsListeningFilter() : channel_(NULL) {}
 
   // MessageFilter overrides
   virtual void OnFilterRemoved() {}
   virtual void OnFilterAdded(IPC::Channel* channel) { channel_ = channel;  }
   virtual bool OnMessageReceived(const IPC::Message& message);
 
   static bool is_listening_;
 
+ protected:
+  virtual ~IsListeningFilter() {}
+
  private:
   IPC::Channel* channel_;
 
   DISALLOW_COPY_AND_ASSIGN(IsListeningFilter);
 };
 
 bool IsListeningFilter::OnMessageReceived(const IPC::Message& message) {
   if (IsListeningFilter::is_listening_) {
     // Proceed with normal operation.
     return false;
@@ skipping 112 matching lines @@
 void PluginChannelHost::OnChannelError() {
   NPChannelBase::OnChannelError();
 
   for (ProxyMap::iterator iter = proxies_.begin();
        iter != proxies_.end(); iter++) {
     iter->second->OnChannelError();
   }
 
   proxies_.clear();
 }