Add base::TimeDelta::Max().

content/renderer/media/websourcebuffer_impl.cc

Index: content/renderer/media/websourcebuffer_impl.cc
diff --git a/content/renderer/media/websourcebuffer_impl.cc b/content/renderer/media/websourcebuffer_impl.cc
index a7d8d8a537803b4f9a2a8bdf42777af21720a5a0..de55d417dc908970ef750855327090f579b80cd6 100644
--- a/content/renderer/media/websourcebuffer_impl.cc
+++ b/content/renderer/media/websourcebuffer_impl.cc
@@ -15,6 +15,8 @@ static base::TimeDelta DoubleToTimeDelta(double time) {
   if (time == std::numeric_limits<double>::infinity())
     return media::kInfiniteDuration();
 
+  // Don't use base::TimeDelta::Max() here, as we want the largest finite time
+  // delta.
   base::TimeDelta max_time = base::TimeDelta::FromInternalValue(kint64max - 1);
   double max_time_in_seconds = max_time.InSecondsF();