Add set_timestamp to cma's DecoderBufferBase

chromecast/media/cma/pipeline/decrypt_util.cc

Index: chromecast/media/cma/pipeline/decrypt_util.cc
diff --git a/chromecast/media/cma/pipeline/decrypt_util.cc b/chromecast/media/cma/pipeline/decrypt_util.cc
index 0010380ca3e048deb7f8cb6733764f86fe29ee7e..abd466148a40ee463043d4df6928b58eb8388de7 100644
--- a/chromecast/media/cma/pipeline/decrypt_util.cc
+++ b/chromecast/media/cma/pipeline/decrypt_util.cc
@@ -24,6 +24,7 @@ class DecoderBufferClear : public DecoderBufferBase {
   // DecoderBufferBase implementation.
   StreamId stream_id() const override;
   base::TimeDelta timestamp() const override;
+  void set_timestamp(const base::TimeDelta& timestamp) override;
   const uint8* data() const override;
   uint8* writable_data() const override;
   size_t data_size() const override;
@@ -54,6 +55,10 @@ base::TimeDelta DecoderBufferClear::timestamp() const {
   return buffer_->timestamp();
 }
 
+void DecoderBufferClear::set_timestamp(const base::TimeDelta& timestamp) {
+  buffer_->set_timestamp(timestamp);
+}
+
 const uint8* DecoderBufferClear::data() const {
   return buffer_->data();
 }