These checks were disabled in Chromium due to historical reason. Also fix compilation errors as a result of the above mentioned change. Change-Id: I5d240f2f11aa5920598f954d696a15bdcbf78fd8
Create new classes: StreamInfo, AudioStreamInfo, VideoStreamInfo, MediaParser, MediaSample, MP4MediaParser. Change-Id: I19c2fc73964d9f8fc90acaddd1783f4e6ff87d07