Remove WebMediaPlayerDelegate null checks

media/blink/webmediaplayer_impl.h

Index: media/blink/webmediaplayer_impl.h
diff --git a/media/blink/webmediaplayer_impl.h b/media/blink/webmediaplayer_impl.h
index da1a062f3bb15e8347e889211251823b9140b874..5321b4aac886d16508824d9d9225caab0d6ee60a 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -90,12 +90,12 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
       public base::SupportsWeakPtr<WebMediaPlayerImpl> {
  public:
   // Constructs a WebMediaPlayer implementation using Chromium's media stack.
-  // |delegate| may be null. |renderer_factory| must not be null.
+  // |delegate| and |renderer_factory| must not be null.
   WebMediaPlayerImpl(
       blink::WebLocalFrame* frame,
       blink::WebMediaPlayerClient* client,
       blink::WebMediaPlayerEncryptedMediaClient* encrypted_client,
-      base::WeakPtr<WebMediaPlayerDelegate> delegate,
+      WebMediaPlayerDelegate* delegate,
       std::unique_ptr<RendererFactory> renderer_factory,
       linked_ptr<UrlIndex> url_index,
       const WebMediaPlayerParams& params);
@@ -506,7 +506,7 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   // |delegate_id_|; an id provided after registering with the delegate.  The
   // WebMediaPlayer may also receive directives (play, pause) from the delegate
   // via the WebMediaPlayerDelegate::Observer interface after registration.
-  base::WeakPtr<WebMediaPlayerDelegate> delegate_;
+  WebMediaPlayerDelegate* delegate_;
   int delegate_id_;
 
   WebMediaPlayerParams::DeferLoadCB defer_load_cb_;