Defer suspend events on Android when audio is active.

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index 29454b64e1ab12feba98ce80e1d88bb66093b504..9bb1486e04317f5f283fa9ccf4665b159b208526 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -777,10 +777,17 @@ bool ChildThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
 }
 
 void ChildThreadImpl::OnProcessBackgrounded(bool backgrounded) {
+  LOG(ERROR) << __func__ << " : " << backgrounded;
   // Set timer slack to maximum on main thread when in background.
   base::TimerSlack timer_slack = base::TIMER_SLACK_NONE;
   if (backgrounded)
     timer_slack = base::TIMER_SLACK_MAXIMUM;
+#if defined(OS_ANDROID)
+  // Defer suspend events on Android if the scheduler says so; this ensures that
+  // functionality like background audio playback works properly.
+  base::PowerMonitor::Get()->DeferSuspendEvents(!backgrounded);
+#endif
+
   base::MessageLoop::current()->SetTimerSlack(timer_slack);
 }