Add ref count to service workers for extension API.

content/public/browser/service_worker_context.h

Index: content/public/browser/service_worker_context.h
diff --git a/content/public/browser/service_worker_context.h b/content/public/browser/service_worker_context.h
index 47f355c734ae46b1a5e17b04968f898a526901c0..0b75115364db74589c254561f40a7fdb3ec6c259 100644
--- a/content/public/browser/service_worker_context.h
+++ b/content/public/browser/service_worker_context.h
@@ -18,6 +18,8 @@ enum class WebNavigationHintType;
 
 namespace content {
 
+class StoragePartition;

[michaeln, 2016/09/24 01:46:51]

no longer needed?

[lazyboy, 2016/09/27 21:26:45]

Done.

+
 // Represents the per-StoragePartition ServiceWorker data.
 class ServiceWorkerContext {
  public:
@@ -60,6 +62,9 @@ class ServiceWorkerContext {
                                      const GURL& script_url,
                                      const ResultCallback& callback) = 0;
 
+  virtual bool IncrementPendingActivity(int64_t service_worker_version_id) = 0;
+  virtual bool DecrementPendingActivity(int64_t service_worker_version_id) = 0;
+
   // Equivalent to calling navigator.serviceWorker.unregister(pattern) from a
   // renderer, except that |pattern| is an absolute URL instead of relative to
   // some current origin.  |callback| is passed true when the JS promise is