Mojify demuxers and allow running {Chunk/FFmpeg}Demuxer in a Utility Process

media/base/source_buffer.cc

Index: media/base/source_buffer.cc
diff --git a/media/base/source_buffer.cc b/media/base/source_buffer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2da1393228540baf77b724d6e70d4e8636c9766e
--- /dev/null
+++ b/media/base/source_buffer.cc
@@ -0,0 +1,13 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/base/source_buffer.h"
+
+namespace media {
+
+SourceBuffer::SourceBuffer() {}
+
+SourceBuffer::~SourceBuffer() {}
+
+}  // namespace media