RefCounted types should not have public destructors, net/

net/base/host_resolver_impl.cc

Index: net/base/host_resolver_impl.cc
diff --git a/net/base/host_resolver_impl.cc b/net/base/host_resolver_impl.cc
index 534f3a49721700258f403814a33166b7f2fb0a52..ec6b0db68fe8878d2b849394495d88e0050b37b2 100644
--- a/net/base/host_resolver_impl.cc
+++ b/net/base/host_resolver_impl.cc
@@ -175,6 +175,9 @@ class CallSystemHostResolverProc : public HostResolverProc {
                                   addr_list,
                                   os_error);
   }
+
+ private:
+  virtual ~CallSystemHostResolverProc() {}
 };
 
 // Extra parameters to attach to the NetLog when the resolve failed.
@@ -217,6 +220,8 @@ class ProcTaskFailedParams : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~ProcTaskFailedParams() {}
+
   const uint32 attempt_number_;
   const int net_error_;
   const int os_error_;
@@ -238,6 +243,8 @@ class DnsTaskFailedParams : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~DnsTaskFailedParams() {}
+
   const int net_error_;
   const int dns_error_;
 };
@@ -266,6 +273,8 @@ class RequestInfoParameters : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~RequestInfoParameters() {}
+
   const HostResolver::RequestInfo info_;
   const NetLog::Source source_;
 };
@@ -285,6 +294,8 @@ class JobCreationParameters : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~JobCreationParameters() {}
+
   const std::string host_;
   const NetLog::Source source_;
 };
@@ -304,6 +315,8 @@ class JobAttachParameters : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~JobAttachParameters() {}
+
   const NetLog::Source source_;
   const RequestPriority priority_;
 };
@@ -327,6 +340,8 @@ class DnsConfigParameters : public NetLog::EventParameters {
   }
 
  private:
+  virtual ~DnsConfigParameters() {}
+
   DnsConfig config_;  // Does not include DnsHosts to save memory and work.
   const size_t num_hosts_;
 };
@@ -637,6 +652,9 @@ class HostResolverImpl::ProcTask
   }
 
  private:
+  friend base::RefCountedThreadSafe<ProcTask>;
+  virtual ~ProcTask() {}
+
   void StartLookupAttempt() {
     DCHECK(origin_loop_->BelongsToCurrentThread());
     base::TimeTicks start_time = base::TimeTicks::Now();