Worker: Enable UseCounter for SharedWorkerGlobalScope

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 0c0a4addafadbb963c7af48a5506c7085e2d20de..487307a0f5e110a3214c25737ed5f98d97847b94 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -539,7 +539,18 @@ IPC_MESSAGE_ROUTED0(ViewMsg_WorkerScriptLoadFailed)
 
 // Sent when the worker has connected.
 // This message is sent only if the worker successfully loaded the script.
-IPC_MESSAGE_ROUTED0(ViewMsg_WorkerConnected)
+// |features| contains numbers of blink::UseCounter::Feature that are used on
+// the worker global scope so far.
+IPC_MESSAGE_ROUTED1(ViewMsg_WorkerConnected,
+                    std::set<uint32_t> /* features */)
+
+// Sent when the worker is destroyed.
+IPC_MESSAGE_ROUTED0(ViewMsg_WorkerDestroyed)
+
+// Sent when the worker calls API that should be recored in UseCounter.
+// |feature| is a number of blink::UseCounter::Feature.
+IPC_MESSAGE_ROUTED1(ViewMsg_CountFeatureOnSharedWorker,
+                    uint32_t /* feature */)
 
 // Sent by the browser to synchronize with the next compositor frame. Used only
 // for tests.