[Android] Suspend shared timers for hidden renderers

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>
 
@@ skipping 609 matching lines @@
   if (msg.routing_id() == MSG_ROUTING_CONTROL)
     return OnControlMessageReceived(msg);
 
   return router_.OnMessageReceived(msg);
 }
 
 bool ChildThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
   return false;
 }
 
+void ChildThreadImpl::OnProcessBackgrounded(bool backgrounded) {

[Sami, 2015/08/28 14:15:01]

Nothing changed here -- you just moved this around, right?

[jdduke (slow), 2015/08/31 18:36:08]

Yep, moved it to preserve ordering as I moved the declaration (had to make it
virtual).

+  // 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;
+  base::MessageLoop::current()->SetTimerSlack(timer_slack);
+}
+
 void ChildThreadImpl::OnShutdown() {
   base::MessageLoop::current()->Quit();
 }
 
 #if defined(IPC_MESSAGE_LOG_ENABLED)
 void ChildThreadImpl::OnSetIPCLoggingEnabled(bool enable) {
   if (enable)
     IPC::Logging::GetInstance()->Enable();
   else
     IPC::Logging::GetInstance()->Disable();
@@ skipping 58 matching lines @@
 
 void ChildThreadImpl::EnsureConnected() {
   VLOG(0) << "ChildThreadImpl::EnsureConnected()";
   base::Process::Current().Terminate(0, false);
 }
 
 bool ChildThreadImpl::IsInBrowserProcess() const {
   return browser_process_io_runner_;
 }
 
-void ChildThreadImpl::OnProcessBackgrounded(bool background) {
-  // Set timer slack to maximum on main thread when in background.
-  base::TimerSlack timer_slack = base::TIMER_SLACK_NONE;
-  if (background)
-    timer_slack = base::TIMER_SLACK_MAXIMUM;
-  base::MessageLoop::current()->SetTimerSlack(timer_slack);
-}
-
 }  // namespace content