Defer suspend events on Android when audio is active.

content/child/child_thread_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/child_thread_impl.h"
 
 #include <signal.h>
 #include <string>
 #include <utility>
 
@@ skipping 759 matching lines @@
 void ChildThreadImpl::StartMojoShellConnection() {
   DCHECK(mojo_shell_connection_);
   mojo_shell_connection_->Start();
 }
 
 bool ChildThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
   return false;
 }
 
 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);
 }
 
 void ChildThreadImpl::OnProcessPurgeAndSuspend() {
 }
 
 void ChildThreadImpl::OnShutdown() {
   base::MessageLoop::current()->QuitWhenIdle();
 }
 
@@ skipping 53 matching lines @@
 void ChildThreadImpl::EnsureConnected() {
   VLOG(0) << "ChildThreadImpl::EnsureConnected()";
   base::Process::Current().Terminate(0, false);
 }
 
 bool ChildThreadImpl::IsInBrowserProcess() const {
   return static_cast<bool>(browser_process_io_runner_);
 }
 
 }  // namespace content