Worker: Enable UseCounter for SharedWorkerGlobalScope

content/common/view_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 521 matching lines @@
 
 // Sent when the worker failed to load the worker script.
 // In normal cases, this message is sent after ViewMsg_WorkerCreated is sent.
 // But if the shared worker of the same URL already exists and it has failed
 // to load the script, when the renderer send ViewHostMsg_CreateWorker before
 // the shared worker is killed only ViewMsg_WorkerScriptLoadFailed is sent.
 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)
+IPC_MESSAGE_ROUTED1(ViewMsg_WorkerConnected,

[horo, 2017/01/25 03:45:10]

Please write comment about |features|.

[nhiroki, 2017/01/25 10:16:11]

Done.

+                    std::vector<char> /* features */)
+
+// Sent when the worker is destroyed.
+IPC_MESSAGE_ROUTED0(ViewMsg_WorkerDestroyed)
+
+// Sent when the worker calls API that should be recored in UseCounter.
+IPC_MESSAGE_ROUTED1(ViewMsg_CountFeatureOnSharedWorker,
+                    uint32_t /* feature */)
 
 // Sent by the browser to synchronize with the next compositor frame. Used only
 // for tests.
 IPC_MESSAGE_ROUTED1(ViewMsg_WaitForNextFrameForTests, int /* routing_id */)
 
 #if BUILDFLAG(ENABLE_PLUGINS)
 // Reply to ViewHostMsg_OpenChannelToPpapiBroker
 // Tells the renderer that the channel to the broker has been created.
 IPC_MESSAGE_ROUTED2(ViewMsg_PpapiBrokerChannelCreated,
                     base::ProcessId /* broker_pid */,
@@ skipping 339 matching lines @@
                     int /* y */)
 
 #elif defined(OS_MACOSX)
 // Receives content of a web page as plain text.
 IPC_MESSAGE_ROUTED1(ViewMsg_GetRenderedTextCompleted, std::string)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.