Simplify/Cleanup MediaClient

chromecast/renderer/cast_content_renderer_client.cc

Index: chromecast/renderer/cast_content_renderer_client.cc
diff --git a/chromecast/renderer/cast_content_renderer_client.cc b/chromecast/renderer/cast_content_renderer_client.cc
index 2092aa1d43f07318ed2bb2d68aab4bb6c3579b29..1dfbebc09bbe9ee31ed67304ad9da287d42cbf36 100644
--- a/chromecast/renderer/cast_content_renderer_client.cc
+++ b/chromecast/renderer/cast_content_renderer_client.cc
@@ -11,11 +11,11 @@
 #include "base/strings/string_number_conversions.h"
 #include "build/build_config.h"
 #include "chromecast/base/chromecast_switches.h"
-#include "chromecast/common/media/cast_media_client.h"
 #include "chromecast/crash/cast_crash_keys.h"
 #include "chromecast/media/base/supported_codec_profile_levels_memo.h"
 #include "chromecast/renderer/cast_render_frame_action_deferrer.h"
 #include "chromecast/renderer/key_systems_cast.h"
+#include "chromecast/renderer/media/cast_media_client.h"
 #include "chromecast/renderer/media/media_caps_observer_impl.h"
 #include "components/network_hints/renderer/prescient_networking_dispatcher.h"
 #include "content/public/common/content_switches.h"
@@ -76,7 +76,8 @@ void CastContentRendererClient::RenderThreadStarted() {
       new media::MediaCapsObserverImpl(&proxy, supported_profiles_.get()));
   media_caps->AddObserver(std::move(proxy));
 
-  chromecast::media::CastMediaClient::Initialize(supported_profiles_.get());
+  ::media::SetMediaClient(
+      new chromecast::media::CastMediaClient(this, supported_profiles_.get()));
 
   prescient_networking_dispatcher_.reset(
       new network_hints::PrescientNetworkingDispatcher());