Reland "Add base::TimeDelta::Max()"

media/filters/chunk_demuxer.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 "media/filters/chunk_demuxer.h"
 
 #include <algorithm>
 #include <deque>
 #include <limits>
 #include <list>
@@ skipping 1519 matching lines @@
   DVLOG(1) << "SetDuration(" << duration << ")";
   DCHECK_GE(duration, 0);
 
   if (duration == GetDuration_Locked())
     return;
 
   // Compute & bounds check the TimeDelta representation of duration.
   // This can be different if the value of |duration| doesn't fit the range or
   // precision of TimeDelta.
   TimeDelta min_duration = TimeDelta::FromInternalValue(1);
+  // Don't use TimeDelta::Max() here, as we want the largest finite time delta.
   TimeDelta max_duration = TimeDelta::FromInternalValue(kint64max - 1);
   double min_duration_in_seconds = min_duration.InSecondsF();
   double max_duration_in_seconds = max_duration.InSecondsF();
 
   TimeDelta duration_td;
   if (duration == std::numeric_limits<double>::infinity()) {
     duration_td = media::kInfiniteDuration();
   } else if (duration < min_duration_in_seconds) {
     duration_td = min_duration;
   } else if (duration > max_duration_in_seconds) {
@@ skipping 329 matching lines @@
 }
 
 void ChunkDemuxer::ShutdownAllStreams() {
   for (SourceStateMap::iterator itr = source_state_map_.begin();
        itr != source_state_map_.end(); ++itr) {
     itr->second->Shutdown();
   }
 }
 
 }  // namespace media