[DO NOT COMMIT] Initial MediaPlayerRenderer plumbing and basic features

media/base/android/BUILD.gn

Index: media/base/android/BUILD.gn
diff --git a/media/base/android/BUILD.gn b/media/base/android/BUILD.gn
index efe77a9d7053b6dc182ed465a33f12c0f6bb0997..a9d6a2b9d4da9ac853e48e763a231c2ab3981f54 100644
--- a/media/base/android/BUILD.gn
+++ b/media/base/android/BUILD.gn
@@ -79,6 +79,19 @@ source_set("android") {
     "//ui/gl",
     "//url",
   ]
+
+  if (force_mojo_media_player_renderer) {
+    sources += [
+      "media_player_renderer.cc",
+      "media_player_renderer.h",
+      "media_player_renderer_factory.cc",
+      "media_player_renderer_factory.h",
+      "url_demuxer_stream.cc",
+      "url_demuxer_stream.h",
+      "url_demuxer_stream_provider.cc",
+      "url_demuxer_stream_provider.h",
+    ]
+  }
 }
 
 source_set("unittests") {