Worker: Enable UseCounter for SharedWorkerGlobalScope

content/browser/shared_worker/shared_worker_host.h

Index: content/browser/shared_worker/shared_worker_host.h
diff --git a/content/browser/shared_worker/shared_worker_host.h b/content/browser/shared_worker/shared_worker_host.h
index 49c65f0d23c1f2938ced8c3c96d88fce8d3aa1e7..5e8a4b8ef8531b78e18eca340cc2c9cc3276edd8 100644
--- a/content/browser/shared_worker/shared_worker_host.h
+++ b/content/browser/shared_worker/shared_worker_host.h
@@ -7,6 +7,7 @@
 
 #include <list>
 #include <memory>
+#include <set>
 #include <utility>
 #include <vector>
 
@@ -62,12 +63,13 @@ class SharedWorkerHost {
   // referenced by active documents.
   void RenderFrameDetached(int render_process_id, int render_frame_id);
 
+  void CountFeature(uint32_t feature);
   void WorkerContextClosed();
+  void WorkerContextDestroyed();
   void WorkerReadyForInspection();
   void WorkerScriptLoaded();
   void WorkerScriptLoadFailed();
   void WorkerConnected(int message_port_id);
-  void WorkerContextDestroyed();
   void AllowFileSystem(const GURL& url,
                        std::unique_ptr<IPC::Message> reply_msg);
   void AllowIndexedDB(const GURL& url,
@@ -141,6 +143,10 @@ class SharedWorkerHost {
   bool closed_ = false;
   const base::TimeTicks creation_time_;
 
+  // This is the set of features that this worker has used. The values must be
+  // from blink::UseCounter::Feature enum.
+  std::set<uint32_t> used_features_;
+
   base::WeakPtrFactory<SharedWorkerHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedWorkerHost);