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 e10872a97a3a816184c39adc5c5cf11e9f2c0474..660b40811a2450037ec27ffbb33cd8affb9c7c87 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -538,7 +538,18 @@ 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.