Keep alive ServiceWorkers when devtools is attached

content/browser/devtools/embedded_worker_devtools_agent_host.cc

Index: content/browser/devtools/embedded_worker_devtools_agent_host.cc
diff --git a/content/browser/devtools/embedded_worker_devtools_agent_host.cc b/content/browser/devtools/embedded_worker_devtools_agent_host.cc
index 8da53a8656405505c7924ee700e7b23485a504ee..955f04fa7e0205d59e1f4ed4b83b6cae1aea416e 100644
--- a/content/browser/devtools/embedded_worker_devtools_agent_host.cc
+++ b/content/browser/devtools/embedded_worker_devtools_agent_host.cc
@@ -35,8 +35,18 @@ void TerminateServiceWorkerOnIO(
   }
 }
 
+void SetDevToolsAttachedOnIO(
+    base::WeakPtr<ServiceWorkerContextCore> context_weak,
+    int64 version_id,
+    bool attached) {
+  if (ServiceWorkerContextCore* context = context_weak.get()) {
+    if (ServiceWorkerVersion* version = context->GetLiveVersion(version_id))
+      version->SetDevToolsAttached(attached);
+  }
 }
 
+}  // namespace
+
 EmbeddedWorkerDevToolsAgentHost::EmbeddedWorkerDevToolsAgentHost(
     WorkerId worker_id,
     const SharedWorkerInstance& shared_worker)
@@ -125,6 +135,13 @@ void EmbeddedWorkerDevToolsAgentHost::Attach() {
 
 void EmbeddedWorkerDevToolsAgentHost::OnClientAttached() {
   DevToolsAgentHostImpl::NotifyCallbacks(this, true);
+  if (service_worker_) {
+    BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+        base::Bind(&SetDevToolsAttachedOnIO,
+                   service_worker_->context_weak(),
+                   service_worker_->version_id(),
+                   true));
+  }
 }
 
 void EmbeddedWorkerDevToolsAgentHost::OnClientDetached() {
@@ -135,6 +152,13 @@ void EmbeddedWorkerDevToolsAgentHost::OnClientDetached() {
     state_ = WORKER_UNINSPECTED;
   }
   DevToolsAgentHostImpl::NotifyCallbacks(this, false);
+  if (service_worker_) {
+    BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+        base::Bind(&SetDevToolsAttachedOnIO,
+                   service_worker_->context_weak(),
+                   service_worker_->version_id(),
+                   false));
+  }
 }
 
 bool EmbeddedWorkerDevToolsAgentHost::OnMessageReceived(