[Android] Suspend shared timers for hidden renderers

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 18daea92a8e0d7d9d41494c8bece73b3cf6548df..47371369dcb397885bf54f69dbdb24ae27e2b1cc 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1156,6 +1156,11 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
   if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
     ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 
+  renderer_scheduler_->SetTimerQueueSuspensionWhenBackgroundedEnabled(
+      GetContentClient()
+          ->renderer()
+          ->AllowTimerSuspensionWhenProcessBackgrounded());
+
   cc_blink::SetSharedBitmapAllocationFunction(AllocateSharedBitmapFunction);
 
   SkGraphics::SetResourceCacheSingleAllocationByteLimit(
@@ -1619,6 +1624,15 @@ bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
   return handled;
 }
 
+void RenderThreadImpl::OnProcessBackgrounded(bool backgrounded) {
+  ChildThreadImpl::OnProcessBackgrounded(backgrounded);
+
+  if (backgrounded)
+    renderer_scheduler_->OnRendererBackgrounded();
+  else
+    renderer_scheduler_->OnRendererForegrounded();
+}
+
 void RenderThreadImpl::OnCreateNewFrame(FrameMsg_NewFrame_Params params) {
   CompositorDependencies* compositor_deps = this;
   RenderFrameImpl::CreateFrame(