[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 e10b26b9fd9327fb005e850d8028027495fcd73a..8e6b8bedee386227d2cd96544784d638370bdddc 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1628,6 +1628,15 @@ 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(