Bug 1407895 - ensure mDecoder->Suspend() is called on a newly created decoder if mPausedForInactiveDocumentOrChannel is true. r=gerald

See comment 3 for the root cause.

MozReview-Commit-ID: CX5npKv2eWG

dom/html/HTMLMediaElement.cpp

@@ -5071,6 +5071,10 @@ HTMLMediaElement::FinishDecoderSetup(MediaDecoder* aDecoder)
   // This will also do an AddRemoveSelfReference.
   NotifyOwnerDocumentActivityChanged();
 
+  if (mPausedForInactiveDocumentOrChannel) {
+    mDecoder->Suspend();
+  }
+
   nsresult rv = NS_OK;
   if (!mPaused) {
     SetPlayedOrSeeked(true);