Update Player instantiator API

Now servo/media player requires a new parameter for its creator, which
is a trait object that provides the GL parameters needed for setup the
generation of frames as GL textures.

This patch provides a dummy GL context trait object where the code
path will go to the default of raw frames.

Webaudio test expectation also were changed, adding two new failing
tests.

components/script/dom/htmlmediaelement.rs

@@ -70,6 +70,7 @@ use net_traits::{CoreResourceMsg, FetchChannels, FetchMetadata, FetchResponseLis
 use net_traits::{NetworkError, ResourceFetchTiming, ResourceTimingType};
 use script_layout_interface::HTMLMediaData;
 use servo_config::pref;
+use servo_media::player::context::{GlContext, NativeDisplay, PlayerGLContext};
 use servo_media::player::frame::{Frame, FrameRenderer};
 use servo_media::player::{PlaybackState, Player, PlayerError, PlayerEvent, StreamType};
 use servo_media::ServoMedia;
@@ -160,6 +161,16 @@ impl FrameRenderer for MediaFrameRenderer {
     }
 }
 
+struct PlayerContextDummy();
+impl PlayerGLContext for PlayerContextDummy {
+    fn get_gl_context(&self) -> GlContext {
+        return GlContext::Unknown;
+    }
+    fn get_native_display(&self) -> NativeDisplay {
+        return NativeDisplay::Unknown;
+    }
+}
+
 #[must_root]
 #[derive(JSTraceable, MallocSizeOf)]
 enum SrcObject {
@@ -1201,7 +1212,9 @@ impl HTMLMediaElement {
             _ => StreamType::Seekable,
         };
 
-        let player = ServoMedia::get().unwrap().create_player(stream_type);
+        let player = ServoMedia::get()
+            .unwrap()
+            .create_player(stream_type, Box::new(PlayerContextDummy()));
 
         let (action_sender, action_receiver) = ipc::channel().unwrap();
         player.register_event_handler(action_sender);