From d906e37232d6a2a60f2f1ed16fe5737b51edf9c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20Qu=C3=A8ze?= <florian@queze.net>
Date: Wed, 4 Oct 2017 16:01:04 +0200
Subject: [PATCH] Bug 1401919 - Functions used after the seekToNextFrame
 promise should not be interpreted half the time, r=nbp.

---
 dom/html/HTMLMediaElement.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/dom/html/HTMLMediaElement.cpp b/dom/html/HTMLMediaElement.cpp
index 1d95e37f47fc..b59474997f1b 100644
--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -2660,6 +2660,18 @@ HTMLMediaElement::FastSeek(double aTime, ErrorResult& aRv)
 already_AddRefed<Promise>
 HTMLMediaElement::SeekToNextFrame(ErrorResult& aRv)
 {
+  /* This will cause JIT code to be kept around longer, to help performance
+   * when using SeekToNextFrame to iterate through every frame of a video.
+   */
+  nsCOMPtr<nsIGlobalObject> global =
+    do_QueryInterface(OwnerDoc()->GetInnerWindow());
+
+  if (global) {
+    if (JSObject *obj = global->GetGlobalJSObject()) {
+      js::NotifyAnimationActivity(obj);
+    }
+  }
+
   return Seek(CurrentTime(), SeekTarget::NextFrame, aRv);
 }