MSE: Add StreamParser buffer remuxing utility and tests

media/filters/source_buffer_stream_unittest.cc

Index: media/filters/source_buffer_stream_unittest.cc
diff --git a/media/filters/source_buffer_stream_unittest.cc b/media/filters/source_buffer_stream_unittest.cc
index 7db62a1b7343b92e1bee11dfb8353ed1f0332216..dce89bb51951df699e2d52148c9fdd8ae6acf93b 100644
--- a/media/filters/source_buffer_stream_unittest.cc
+++ b/media/filters/source_buffer_stream_unittest.cc
@@ -303,8 +303,10 @@ class SourceBufferStreamTest : public testing::Test {
     for (int i = 0; i < number_of_buffers; i++) {
       int position = starting_position + i;
       bool is_keyframe = position % keyframe_interval == 0;
+      // |kAudio| buffer type is meaningless to these tests.
       scoped_refptr<StreamParserBuffer> buffer =
-          StreamParserBuffer::CopyFrom(data, size, is_keyframe);
+          StreamParserBuffer::CopyFrom(data, size, is_keyframe,
+                                       StreamParserBuffer::kAudio);
       base::TimeDelta timestamp = frame_duration_ * position;
 
       if (i == 0)
@@ -391,9 +393,10 @@ class SourceBufferStreamTest : public testing::Test {
       int time_in_ms;
       CHECK(base::StringToInt(timestamps[i], &time_in_ms));
 
-      // Create buffer.
+      // Create buffer. |kAudio| buffer type is meaningless to these tests.
       scoped_refptr<StreamParserBuffer> buffer =
-          StreamParserBuffer::CopyFrom(&kDataA, kDataSize, is_keyframe);
+          StreamParserBuffer::CopyFrom(&kDataA, kDataSize, is_keyframe,
+                                       StreamParserBuffer::kAudio);
       base::TimeDelta timestamp =
           base::TimeDelta::FromMilliseconds(time_in_ms);
       buffer->set_timestamp(timestamp);