Add support for external video renderers in mojo.

media/mojo/services/renderer_config_default.cc

Index: media/mojo/services/renderer_config_default.cc
diff --git a/media/mojo/services/renderer_config_default.cc b/media/mojo/services/renderer_config_default.cc
index 0d7215ff154f93ea2a3fd1a71ae706de0217d8de..76da6db577025bdca91734d0e72c312438fd4d0b 100644
--- a/media/mojo/services/renderer_config_default.cc
+++ b/media/mojo/services/renderer_config_default.cc
@@ -10,9 +10,17 @@
 #include "media/audio/audio_output_stream_sink.h"
 #include "media/audio/fake_audio_log_factory.h"
 #include "media/base/media.h"
-#include "media/filters/ffmpeg_audio_decoder.h"
 #include "media/filters/opus_audio_decoder.h"
 
+#if !defined(OS_ANDROID)
+#include "media/filters/ffmpeg_audio_decoder.h"
+#include "media/filters/ffmpeg_video_decoder.h"
+#endif
+
+#if !defined(MEDIA_DISABLE_LIBVPX)
+#include "media/filters/vpx_video_decoder.h"
+#endif
+
 namespace media {
 namespace internal {
 
@@ -56,6 +64,25 @@ class DefaultRendererConfig : public PlatformRendererConfig {
     return audio_decoders.Pass();
   }
 
+  ScopedVector<VideoDecoder> GetVideoDecoders(
+      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+      const LogCB& media_log_cb) override {
+    ScopedVector<VideoDecoder> video_decoders;
+
+    // TODO(dalecurtis): If we ever need GPU video decoders, we'll need to
+    // figure out how to retrieve the GpuVideoAcceleratorFactories...
+
+#if !defined(MEDIA_DISABLE_LIBVPX)
+    video_decoders.push_back(new VpxVideoDecoder(media_task_runner));
+#endif  // !defined(MEDIA_DISABLE_LIBVPX)
+
+#if !defined(OS_ANDROID)
+    video_decoders.push_back(new FFmpegVideoDecoder(media_task_runner));
+#endif
+
+    return video_decoders.Pass();
+  }
+
   scoped_refptr<AudioRendererSink> GetAudioRendererSink() override {
     return new AudioOutputStreamSink();
   }