Lower the priority of shared workers

content/browser/worker_host/worker_process_host.cc

Index: content/browser/worker_host/worker_process_host.cc
diff --git a/content/browser/worker_host/worker_process_host.cc b/content/browser/worker_host/worker_process_host.cc
index b818b9d1b8945698b6994a912286db94b84a5b56..d00cfb95f32a85cb21e580c300ab4c9374f8b1f7 100644
--- a/content/browser/worker_host/worker_process_host.cc
+++ b/content/browser/worker_host/worker_process_host.cc
@@ -114,7 +114,8 @@ WorkerProcessHost::WorkerProcessHost(
     ResourceContext* resource_context,
     const WorkerStoragePartition& partition)
     : resource_context_(resource_context),
-      partition_(partition) {
+      partition_(partition),
+      process_launched_(false) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(resource_context_);
   process_.reset(
@@ -318,6 +319,9 @@ bool WorkerProcessHost::FilterMessage(const IPC::Message& message,
 }
 
 void WorkerProcessHost::OnProcessLaunched() {
+  process_launched_ = true;
+
+  WorkerServiceImpl::GetInstance()->NotifyWorkerProcessCreated();
 }
 
 bool WorkerProcessHost::OnMessageReceived(const IPC::Message& message) {
@@ -538,6 +542,10 @@ void WorkerProcessHost::TerminateWorker(int worker_route_id) {
   Send(new WorkerMsg_TerminateWorkerContext(worker_route_id));
 }
 
+void WorkerProcessHost::SetBackgrounded(bool backgrounded) {
+  process_->SetBackgrounded(backgrounded);
+}
+
 const ChildProcessData& WorkerProcessHost::GetData() {
   return process_->GetData();
 }