Reject play promises when the playback reaches the end.

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
index 477cbbbd0a63ee29b73920abdcffb48bba5588b0..41cb9f8ca61697ee8159d6daaaa4b820b02e375c 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
@@ -2913,6 +2913,7 @@ void HTMLMediaElement::timeChanged()
                 // changes paused to true and fires a simple event named pause at the media element.
                 m_paused = true;
                 scheduleEvent(EventTypeNames::pause);
+                scheduleRejectPlayPromises(AbortError);

[foolip, 2016/08/18 20:16:17]

Add a TODO to add event firing and rejection in the same task? Maybe you have an
umbrella bug for these GenericEventQueue vs. other tasks already.

[mlamouri (slow - plz ping), 2016/08/19 09:26:29]

It is bug 587871. Given that we never bundle promises and events in one task, I
don't think adding TODO all over the code would make much sense and adding TODO
in some places and not other would be strange.

             }
             // Queue a task to fire a simple event named ended at the media element.
             scheduleEvent(EventTypeNames::ended);