media: Pass CdmContext in decoder reinitialization

media/filters/fake_video_decoder.h

Index: media/filters/fake_video_decoder.h
diff --git a/media/filters/fake_video_decoder.h b/media/filters/fake_video_decoder.h
index 454762fc50084d15889006d45072871f0b3d3308..3ac932f3f4bb0295721295d357d90ea193243892 100644
--- a/media/filters/fake_video_decoder.h
+++ b/media/filters/fake_video_decoder.h
@@ -39,6 +39,9 @@ class FakeVideoDecoder : public VideoDecoder {
                    const BytesDecodedCB& bytes_decoded_cb);
   ~FakeVideoDecoder() override;
 
+  // Enables encrypted config supported. Must be called before Initialize().
+  void EnableEncryptedConfigSupport();
+
   // VideoDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const VideoDecoderConfig& config,
@@ -99,6 +102,8 @@ class FakeVideoDecoder : public VideoDecoder {
   const int max_parallel_decoding_requests_;
   BytesDecodedCB bytes_decoded_cb_;
 
+  bool supports_encrypted_config_ = false;
+
   State state_;
 
   CallbackHolder<InitCB> init_cb_;