Bug 1224936 - AudioChannelAgent should be informed when HTMLMediaElement dispatches an error, r=roc

dom/html/HTMLMediaElement.cpp

@@ -786,6 +786,7 @@ void HTMLMediaElement::NoSupportedMediaSourceError()
   ChangeNetworkState(nsIDOMHTMLMediaElement::NETWORK_NO_SOURCE);
   DispatchAsyncEvent(NS_LITERAL_STRING("error"));
   ChangeDelayLoadStatus(false);
+  UpdateAudioChannelPlayingState();
 }
 
 typedef void (HTMLMediaElement::*SyncSectionFn)();
@@ -3530,6 +3531,7 @@ void HTMLMediaElement::Error(uint16_t aErrorCode)
     ChangeNetworkState(nsIDOMHTMLMediaElement::NETWORK_IDLE);
   }
   ChangeDelayLoadStatus(false);
+  UpdateAudioChannelPlayingState();
 }
 
 void HTMLMediaElement::PlaybackEnded()
@@ -4756,6 +4758,11 @@ HTMLMediaElement::IsPlayingThroughTheAudioChannel() const
     return false;
   }
 
+  // If we have an error, we are not playing.
+  if (mError) {
+    return false;
+  }
+
   // The volume should not be ~0
   if (std::fabs(Volume()) <= 1e-7) {
     return false;