Fix non-virtual destructor in DelegatedFrameHostClient

content/browser/renderer_host/delegated_frame_host.h

Index: content/browser/renderer_host/delegated_frame_host.h
diff --git a/content/browser/renderer_host/delegated_frame_host.h b/content/browser/renderer_host/delegated_frame_host.h
index a24a821641fdf463c13c8a16074a1fe4a8e61db0..32e539ec57735a10f58160fe1fe4bbb11aa14817 100644
--- a/content/browser/renderer_host/delegated_frame_host.h
+++ b/content/browser/renderer_host/delegated_frame_host.h
@@ -53,6 +53,8 @@ class ResizeLock;
 // display them.
 class CONTENT_EXPORT DelegatedFrameHostClient {
  public:
+  virtual ~DelegatedFrameHostClient() {}
+
   virtual ui::Layer* DelegatedFrameHostGetLayer() const = 0;
   virtual bool DelegatedFrameHostIsVisible() const = 0;