Pass DecryptConfig parameters over IPC and use it in AVDA.

media/base/bitstream_buffer.cc

+#include "media/base/bitstream_buffer.h"
+
+namespace media {
+
+BitstreamBuffer::BitstreamBuffer(int32 id,
+                                 base::SharedMemoryHandle handle,
+                                 size_t size)
+    : id_(id),
+      handle_(handle),
+      size_(size),
+      presentation_timestamp_(kNoTimestamp()) {}
+
+BitstreamBuffer::BitstreamBuffer(int32 id,
+                                 base::SharedMemoryHandle handle,
+                                 size_t size,
+                                 base::TimeDelta presentation_timestamp)
+    : id_(id),
+      handle_(handle),
+      size_(size),
+      presentation_timestamp_(presentation_timestamp) {}
+
+BitstreamBuffer::~BitstreamBuffer() {}
+
+void BitstreamBuffer::SetDecryptParams(const DecryptConfig& decrypt_config) {
+  key_id_ = decrypt_config.key_id();
+  iv_ = decrypt_config.iv();
+  subsamples_ = decrypt_config.subsamples();
+}
+
+}  // namespace media