RefCounted types should not have public destructors, delegate cleanup

chrome/common/net/gaia/gaia_oauth_client.h

Index: chrome/common/net/gaia/gaia_oauth_client.h
diff --git a/chrome/common/net/gaia/gaia_oauth_client.h b/chrome/common/net/gaia/gaia_oauth_client.h
index 6a132acd20d2a47f125eba6f5b2579d2238eef21..e5156aff34d95c8f0b7c6ad691733306155a786f 100644
--- a/chrome/common/net/gaia/gaia_oauth_client.h
+++ b/chrome/common/net/gaia/gaia_oauth_client.h
@@ -30,8 +30,6 @@ class GaiaOAuthClient {
  public:
   class Delegate {
    public:
-    virtual ~Delegate() { }
-
     // Invoked on a successful response to the GetTokensFromAuthCode request.
     virtual void OnGetTokensResponse(const std::string& refresh_token,
                                      const std::string& access_token,
@@ -45,6 +43,9 @@ class GaiaOAuthClient {
     // response. This is invoked when the maximum number of retries have been
     // exhausted. If max_retries is -1, this is never invoked.
     virtual void OnNetworkError(int response_code) = 0;
+
+   protected:
+    virtual ~Delegate() {}
   };
   GaiaOAuthClient(const std::string& gaia_url,
                   net::URLRequestContextGetter* context_getter);