win: Ref-counted classes should have non-public destructors.

content/common/font_cache_dispatcher_win.h

Index: content/common/font_cache_dispatcher_win.h
diff --git a/content/common/font_cache_dispatcher_win.h b/content/common/font_cache_dispatcher_win.h
index 3d3d370eae424d1fe50c95a95469df1cc727002c..3c0faf8ad36984e4b2fd583d3841e0476767c4e8 100644
--- a/content/common/font_cache_dispatcher_win.h
+++ b/content/common/font_cache_dispatcher_win.h
@@ -20,12 +20,13 @@ namespace content {
 class FontCacheDispatcher : public IPC::MessageFilter, public IPC::Sender {
  public:
   FontCacheDispatcher();
-  ~FontCacheDispatcher() override;
 
   // IPC::Sender implementation:
   bool Send(IPC::Message* message) override;
 
  private:
+  ~FontCacheDispatcher() override;
+
   // IPC::MessageFilter implementation:
   void OnFilterAdded(IPC::Sender* sender) override;
   bool OnMessageReceived(const IPC::Message& message) override;