Add WorkerScriptLoaded message to support attaching DevTools while starting ServiceWorker.

content/common/service_worker/embedded_worker_messages.h

 // Copyright 2014 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.
 
 // Message definition file, included multiple times, hence no include guard.
 
 #include <string>
 
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 26 matching lines @@
 IPC_STRUCT_END()
 
 // Browser -> Renderer message to create a new embedded worker context.
 IPC_MESSAGE_CONTROL1(EmbeddedWorkerMsg_StartWorker,
                      EmbeddedWorkerMsg_StartWorker_Params /* params */)
 
 // Browser -> Renderer message to stop (terminate) the embedded worker.
 IPC_MESSAGE_CONTROL1(EmbeddedWorkerMsg_StopWorker,
                      int /* embedded_worker_id */)
 
+// Renderer -> Browser message to indicate that the worker has loadedd the
+// script.
+IPC_MESSAGE_CONTROL1(EmbeddedWorkerHostMsg_WorkerScriptLoaded,
+                     int /* embedded_worker_id */)
+
 // Renderer -> Browser message to indicate that the worker is started.
 IPC_MESSAGE_CONTROL2(EmbeddedWorkerHostMsg_WorkerStarted,
                      int /* thread_id */,
                      int /* embedded_worker_id */)
 
 // Renderer -> Browser message to indicate that the worker is stopped.
 IPC_MESSAGE_CONTROL1(EmbeddedWorkerHostMsg_WorkerStopped,
                      int /* embedded_worker_id */)
 
 // Renderer -> Browser message to report an exception.
@@ skipping 16 matching lines @@
 // for this for easier cross-thread message dispatching.
 
 #undef IPC_MESSAGE_START
 #define IPC_MESSAGE_START EmbeddedWorkerContextMsgStart
 
 // Browser -> Renderer message to send message.
 IPC_MESSAGE_CONTROL3(EmbeddedWorkerContextMsg_MessageToWorker,
                      int /* thread_id */,
                      int /* embedded_worker_id */,
                      IPC::Message /* message */)