Fix UninitCondition in TrackRunIterator tests.

media/mp4/track_run_iterator_unittest.cc

 // Copyright (c) 2012 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 "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/mp4/box_definitions.h"
 #include "media/mp4/rcheck.h"
 #include "media/mp4/track_run_iterator.h"
@@ skipping 48 matching lines @@
   }
 
   MovieFragment CreateFragment() {
     MovieFragment moof;
     moof.tracks.resize(2);
     moof.tracks[0].decode_time.decode_time = 0;
     moof.tracks[0].header.track_id = 1;
     moof.tracks[0].header.has_default_sample_flags = true;
     moof.tracks[0].header.default_sample_duration = 1024;
     moof.tracks[0].header.default_sample_size = 4;
+    moof.tracks[0].header.sample_description_index = 0;
     moof.tracks[0].runs.resize(2);
     moof.tracks[0].runs[0].sample_count = 10;
     moof.tracks[0].runs[0].data_offset = 100;
     SetAscending(&moof.tracks[0].runs[0].sample_sizes);
 
     moof.tracks[0].runs[1].sample_count = 10;
     moof.tracks[0].runs[1].data_offset = 10000;
 
     moof.tracks[1].header.track_id = 2;
     moof.tracks[1].header.has_default_sample_flags = false;
+    moof.tracks[1].header.sample_description_index = 0;
     moof.tracks[1].decode_time.decode_time = 10;
     moof.tracks[1].runs.resize(1);
     moof.tracks[1].runs[0].sample_count = 10;
     moof.tracks[1].runs[0].data_offset = 200;
     SetAscending(&moof.tracks[1].runs[0].sample_sizes);
     SetAscending(&moof.tracks[1].runs[0].sample_durations);
     moof.tracks[1].runs[0].sample_flags.resize(10);
     for (size_t i = 1; i < moof.tracks[1].runs[0].sample_flags.size(); i++) {
       moof.tracks[1].runs[0].sample_flags[i] =
           kSampleIsDifferenceSampleFlagMask;
@@ skipping 132 matching lines @@
   EXPECT_EQ(iter_->cts(), TimeDeltaFromFrac(2, kVideoScale));
   EXPECT_EQ(iter_->duration(), TimeDeltaFromFrac(1, kVideoScale));
   iter_->AdvanceSample();
   EXPECT_EQ(iter_->dts(), TimeDeltaFromFrac(1, kVideoScale));
   EXPECT_EQ(iter_->cts(), TimeDeltaFromFrac(0, kVideoScale));
   EXPECT_EQ(iter_->duration(), TimeDeltaFromFrac(2, kVideoScale));
 }
 
 }  // namespace mp4
 }  // namespace media