From aeaefbaddf3144abf8fb5edd0ebddf211248f0f1 Mon Sep 17 00:00:00 2001
From: xster <xiao@xster.net>
Date: Thu, 20 Jul 2017 10:54:08 -0700
Subject: [PATCH] Always schedule a frame on app did become active (#3910)

---
 shell/common/engine.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/shell/common/engine.cc b/shell/common/engine.cc
index 6be1ac4d9..9f15f3397 100644
--- a/shell/common/engine.cc
+++ b/shell/common/engine.cc
@@ -327,6 +327,12 @@ bool Engine::HandleLifecyclePlatformMessage(blink::PlatformMessage* message) {
     activity_running_ = true;
     StartAnimatorIfPossible();
   }
+
+  // Always schedule a frame when the app does become active as per API
+  // recommendation https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622956-applicationdidbecomeactive?language=objc
+  if (state == "AppLifecycleState.resumed" && have_surface_) {
+    ScheduleFrame();
+  }
   return false;
 }
 
-- 
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