MSE: Add StreamParser buffer remuxing utility and tests

media/base/stream_parser_buffer.cc

Index: media/base/stream_parser_buffer.cc
diff --git a/media/base/stream_parser_buffer.cc b/media/base/stream_parser_buffer.cc
index e5cc9795c0318ca7e3e485fb4c553fb9cae0fa58..0b55f16e033097038c6838d21a2738f5451a2ab9 100644
--- a/media/base/stream_parser_buffer.cc
+++ b/media/base/stream_parser_buffer.cc
@@ -19,21 +19,22 @@ static bool HasNestedFadeOutPreroll(
 }
 
 scoped_refptr<StreamParserBuffer> StreamParserBuffer::CreateEOSBuffer() {
-  return make_scoped_refptr(new StreamParserBuffer(NULL, 0, NULL, 0, false));
+  return make_scoped_refptr(new StreamParserBuffer(NULL, 0, NULL, 0, false,
+                                                   DemuxerStream::UNKNOWN));
 }
 
 scoped_refptr<StreamParserBuffer> StreamParserBuffer::CopyFrom(
-    const uint8* data, int data_size, bool is_keyframe) {
+    const uint8* data, int data_size, bool is_keyframe, Type type) {
   return make_scoped_refptr(
-      new StreamParserBuffer(data, data_size, NULL, 0, is_keyframe));
+      new StreamParserBuffer(data, data_size, NULL, 0, is_keyframe, type));
 }
 
 scoped_refptr<StreamParserBuffer> StreamParserBuffer::CopyFrom(
     const uint8* data, int data_size,
-    const uint8* side_data, int side_data_size, bool is_keyframe) {
+    const uint8* side_data, int side_data_size, bool is_keyframe, Type type) {
   return make_scoped_refptr(
       new StreamParserBuffer(data, data_size, side_data, side_data_size,
-                             is_keyframe));
+                             is_keyframe, type));
 }
 
 base::TimeDelta StreamParserBuffer::GetDecodeTimestamp() const {
@@ -48,11 +49,14 @@ void StreamParserBuffer::SetDecodeTimestamp(const base::TimeDelta& timestamp) {
 
 StreamParserBuffer::StreamParserBuffer(const uint8* data, int data_size,
                                        const uint8* side_data,
-                                       int side_data_size, bool is_keyframe)
+                                       int side_data_size, bool is_keyframe,
+                                       Type type)
     : DecoderBuffer(data, data_size, side_data, side_data_size),
       is_keyframe_(is_keyframe),
       decode_timestamp_(kNoTimestamp()),
-      config_id_(kInvalidConfigId) {
+      config_id_(kInvalidConfigId),
+      type_(type),
+      text_track_number_(-1) {
   // TODO(scherkus): Should DataBuffer constructor accept a timestamp and
   // duration to force clients to set them? Today they end up being zero which
   // is both a common and valid value and could lead to bugs.