Fix mp4 keyframe parsing, removing unused stss parsing.

media/formats/mp4/box_definitions.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_
 #define MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 222 matching lines @@
 };
 
 struct MEDIA_EXPORT SampleDescription : Box {
   DECLARE_BOX_METHODS(SampleDescription);
 
   TrackType type;
   std::vector<VideoSampleEntry> video_entries;
   std::vector<AudioSampleEntry> audio_entries;
 };
 
-struct MEDIA_EXPORT SyncSample : Box {
-  DECLARE_BOX_METHODS(SyncSample);
-
-  // Returns true if the |k|th sample is a sync sample (aka a random
-  // access point). Returns false if sample |k| is not a sync sample.
-  bool IsSyncSample(size_t k) const;
-
-  bool is_present;
-  std::vector<uint32> entries;
-};
-
 struct MEDIA_EXPORT CencSampleEncryptionInfoEntry {
   CencSampleEncryptionInfoEntry();
   ~CencSampleEncryptionInfoEntry();
 
   bool is_encrypted;
   uint8 iv_size;
   std::vector<uint8> key_id;
 };
 
 struct MEDIA_EXPORT SampleGroupDescription : Box {  // 'sgpd'.
   DECLARE_BOX_METHODS(SampleGroupDescription);
 
   uint32 grouping_type;
   std::vector<CencSampleEncryptionInfoEntry> entries;
 };
 
 struct MEDIA_EXPORT SampleTable : Box {
   DECLARE_BOX_METHODS(SampleTable);
 
   // Media Source specific: we ignore many of the sub-boxes in this box,
   // including some that are required to be present in the BMFF spec. This
   // includes the 'stts', 'stsc', and 'stco' boxes, which must contain no
   // samples in order to be compliant files.
   SampleDescription description;
-  SyncSample sync_sample;
   SampleGroupDescription sample_group_description;
 };
 
 struct MEDIA_EXPORT MediaHeader : Box {
   DECLARE_BOX_METHODS(MediaHeader);
 
   uint64 creation_time;
   uint64 modification_time;
   uint32 timescale;
   uint64 duration;
@@ skipping 151 matching lines @@
   std::vector<TrackFragment> tracks;
   std::vector<ProtectionSystemSpecificHeader> pssh;
 };
 
 #undef DECLARE_BOX
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_