RefCounted types should not have public destructors, delegate cleanup

content/browser/ppapi_plugin_process_host.h

Index: content/browser/ppapi_plugin_process_host.h
diff --git a/content/browser/ppapi_plugin_process_host.h b/content/browser/ppapi_plugin_process_host.h
index deef50f32b56c1d9659c41e3a23ed9bd8da92ab3..723daace191c331583431fcc0197cb4b5c62d647 100644
--- a/content/browser/ppapi_plugin_process_host.h
+++ b/content/browser/ppapi_plugin_process_host.h
@@ -50,15 +50,23 @@ class PpapiPluginProcessHost : public content::BrowserChildProcessHostDelegate,
 
     // Returns true if the current connection is off-the-record.
     virtual bool OffTheRecord() = 0;
+
+   protected:
+    virtual ~Client() {}
   };
 
   class PluginClient : public Client {
    public:
     // Returns the resource context for the renderer requesting the channel.
     virtual content::ResourceContext* GetResourceContext() = 0;
+
+   protected:
+    virtual ~PluginClient() {}
   };
 
   class BrokerClient : public Client {
+   protected:
+    virtual ~BrokerClient() {}
   };
 
   virtual ~PpapiPluginProcessHost();