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 f12fa45f7f47a36856b2a9236ac9c1553800e0ab..8d6953a07500331ff51e6674da51c1197b242ba6 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -538,7 +538,19 @@ 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)
+// |use_counter| contains the values from the blink::UseCounter::Feature enum
+// that are counted on the worker global scope so far.
+IPC_MESSAGE_ROUTED1(ViewMsg_WorkerConnected,
+                    std::set<uint32_t> /* use_counter */)
+
+// Sent when the worker is destroyed.
+IPC_MESSAGE_ROUTED0(ViewMsg_WorkerDestroyed)
+
+// Sent when the worker calls API that should be recored in UseCounter.
+// |use_counter_id| must be one of the values from blink::UseCounter::Feature
+// enum.
+IPC_MESSAGE_ROUTED1(ViewMsg_CountFeatureOnSharedWorker,
+                    uint32_t /* use_counter_id */)
 
 // Sent by the browser to synchronize with the next compositor frame. Used only
 // for tests.