Fix signed integers in track_run_iterator.cc

media/formats/mp4/track_run_iterator.cc

 // 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.
 
 #include "media/formats/mp4/track_run_iterator.h"
 
 #include <algorithm>
 #include <iomanip>
 #include <limits>
 #include <memory>
 
 #include "base/macros.h"
 #include "media/formats/mp4/rcheck.h"
 #include "media/formats/mp4/sample_to_group_iterator.h"
 #include "media/media_features.h"
 
 namespace media {
 namespace mp4 {
 
 struct SampleInfo {
-  int size;
-  int duration;
+  uint32_t size;
+  uint32_t duration;
   int cts_offset;
   bool is_keyframe;
   uint32_t cenc_group_description_index;
 };
 
 struct TrackRunInfo {
   uint32_t track_id;
   std::vector<SampleInfo> samples;
   int64_t timescale;
   int64_t start_dts;
@@ skipping 678 matching lines @@
       index == 0 ? track_encryption().default_constant_iv
                  : GetSampleEncryptionInfoEntry(*run_itr_, index)->constant_iv;
   RCHECK(constant_iv != nullptr);
   memcpy(entry->initialization_vector, constant_iv, kInitializationVectorSize);
   return true;
 }
 #endif
 
 }  // namespace mp4
 }  // namespace media