Refactor MediaResource to be multi-stream capable

media/remoting/fake_media_resource.cc

Index: media/remoting/fake_media_resource.cc
diff --git a/media/remoting/fake_media_resource.cc b/media/remoting/fake_media_resource.cc
index 16d7403559050cb51cb3d5b2ca8cad453035a19c..91be95d3a9bbba71eb7f49bee4c8f259c6f771f5 100644
--- a/media/remoting/fake_media_resource.cc
+++ b/media/remoting/fake_media_resource.cc
@@ -73,7 +73,7 @@ VideoRotation FakeDemuxerStream::video_rotation() {
 }
 
 bool FakeDemuxerStream::enabled() const {
-  return false;
+  return true;
 }
 
 void FakeDemuxerStream::CreateFakeFrame(size_t size,
@@ -106,10 +106,15 @@ FakeMediaResource::FakeMediaResource()
 
 FakeMediaResource::~FakeMediaResource() {}
 
-DemuxerStream* FakeMediaResource::GetStream(DemuxerStream::Type type) {
-  if (type == DemuxerStream::AUDIO)
-    return reinterpret_cast<DemuxerStream*>(demuxer_stream_.get());
-  return nullptr;
+std::vector<DemuxerStream*> FakeMediaResource::GetStreams() {
+  std::vector<DemuxerStream*> streams;
+  streams.push_back(demuxer_stream_.get());
+  return streams;
+}
+
+void FakeMediaResource::SetStreamStatusChangeCB(
+    const StreamStatusChangeCB& cb) {
+  NOTIMPLEMENTED();
 }
 
 }  // namespace remoting