Add ref count to service workers for extension API.

content/browser/service_worker/service_worker_context_wrapper.cc

Index: content/browser/service_worker/service_worker_context_wrapper.cc
diff --git a/content/browser/service_worker/service_worker_context_wrapper.cc b/content/browser/service_worker/service_worker_context_wrapper.cc
index eeac4d3bfa1a06a2f5aa0af8950ffaa784dac6ae..4a6aa89aa426757c52f0817bc06a00ab7cd3c55c 100644
--- a/content/browser/service_worker/service_worker_context_wrapper.cc
+++ b/content/browser/service_worker/service_worker_context_wrapper.cc
@@ -22,6 +22,7 @@
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
+#include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_context_observer.h"
 #include "content/browser/service_worker/service_worker_process_manager.h"
@@ -832,6 +833,32 @@ void ServiceWorkerContextWrapper::ShutdownOnIO() {
   context_core_.reset();
 }
 
+bool ServiceWorkerContextWrapper::IncrementPendingActivity(
+    int64_t service_worker_version_id,
+    const std::string& request_uuid) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  ServiceWorkerVersion* version =
+      context()->GetLiveVersion(service_worker_version_id);
+  if (!version)
+    return false;
+
+  return version->StartExternalRequest(request_uuid);
+}
+
+bool ServiceWorkerContextWrapper::DecrementPendingActivity(
+    int64_t service_worker_version_id,
+    const std::string& request_uuid) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  ServiceWorkerVersion* version =
+      context()->GetLiveVersion(service_worker_version_id);
+
+  if (!version)
+    return false;
+
+  return version->FinishExternalRequest(request_uuid);
+}
+
 void ServiceWorkerContextWrapper::DidDeleteAndStartOver(
     ServiceWorkerStatusCode status) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);