Update duration when demuxed packets exceed known duration.

content/renderer/media/render_media_log_unittest.cc

Index: content/renderer/media/render_media_log_unittest.cc
diff --git a/content/renderer/media/render_media_log_unittest.cc b/content/renderer/media/render_media_log_unittest.cc
index c383dcd86a16a35c0540bc3b1c0ee9d6decbf79a..60d3139a1802e7ee2cb92edc595ac0d5554f37a1 100644
--- a/content/renderer/media/render_media_log_unittest.cc
+++ b/content/renderer/media/render_media_log_unittest.cc
@@ -123,4 +123,27 @@ TEST_F(RenderMediaLogTest, BufferedExtents) {
   EXPECT_EQ(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED, events[2].type);
 }
 
+TEST_F(RenderMediaLogTest, DurationChanged) {
+  AddEvent(media::MediaLogEvent::LOAD);
+  AddEvent(media::MediaLogEvent::SEEK);
+
+  // This event is handled separately and should always appear last regardless
+  // of how many times we see it.
+  AddEvent(media::MediaLogEvent::DURATION_SET);
+  AddEvent(media::MediaLogEvent::DURATION_SET);
+  AddEvent(media::MediaLogEvent::DURATION_SET);
+
+  EXPECT_EQ(0, message_count());
+  Advance(base::TimeDelta::FromMilliseconds(1000));
+  EXPECT_EQ(1, message_count());
+
+  // Verify contents. There should only be a single buffered extents changed
+  // event.
+  std::vector<media::MediaLogEvent> events = GetMediaLogEvents();
+  ASSERT_EQ(3u, events.size());
+  EXPECT_EQ(media::MediaLogEvent::LOAD, events[0].type);
+  EXPECT_EQ(media::MediaLogEvent::SEEK, events[1].type);
+  EXPECT_EQ(media::MediaLogEvent::DURATION_SET, events[2].type);
+}
+
 }  // namespace content