[3/5 chromium] Shows the clients which are controlled by ServiceWorker in DevTools.

content/common/service_worker/service_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 <vector>
 
 #include "base/strings/string16.h"
@@ skipping 132 matching lines @@
 
 // Sends a 'message' event to a service worker (renderer->browser).
 IPC_MESSAGE_CONTROL3(
     ServiceWorkerHostMsg_PostMessageToWorker,
     int /* handle_id */,
     base::string16 /* message */,
     std::vector<content::TransferredMessagePort> /* sent_message_ports */)
 
 // Informs the browser of a new ServiceWorkerProvider in the child process,
 // |provider_id| is unique within its child process.
-// |render_frame_id| identifies the frame associated with the provider, it will
-// it will be MSG_ROUTING_NONE if the context is a worker instead of a document.
+// When the context is a Document, |route_id| is the frame ID of it. When the

[dcheng, 2015/06/17 02:57:30]

What does "context" mean here?

[horo, 2015/06/17 07:37:05]

"context" means "for what the provider was created".

+// context is a Shared Worker, |route_id| is the Shared Worker route ID. When
+// the context is a Service Worker, |route_id| is MSG_ROUTING_NONE.
 // |provider_type| identifies whether this provider is for ServiceWorker
 // controllees (documents and SharedWorkers) or for controllers
 // (ServiceWorkers).
 IPC_MESSAGE_CONTROL3(ServiceWorkerHostMsg_ProviderCreated,
                      int /* provider_id */,
-                     int /* render_frame_id */,
+                     int /* route_id */,
                      content::ServiceWorkerProviderType /* provider_type */)
 
 // Informs the browser of a ServiceWorkerProvider being destroyed.
 IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderDestroyed,
                      int /* provider_id */)
 
 // Increments and decrements the ServiceWorker object's reference
 // counting in the browser side. The ServiceWorker object is created
 // with ref-count==1 initially.
 IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_IncrementServiceWorkerRefCount,
@@ skipping 294 matching lines @@
 IPC_MESSAGE_CONTROL2(ServiceWorkerMsg_FocusClientResponse,
                      int /* request_id */,
                      content::ServiceWorkerClientInfo /* client */)
 
 // Sent via EmbeddedWorker to transfer a stashed message port to the worker.
 IPC_MESSAGE_CONTROL3(
     ServiceWorkerMsg_SendStashedMessagePorts,
     std::vector<content::TransferredMessagePort> /* stashed_message_ports */,
     std::vector<int> /* new_routing_ids */,
     std::vector<base::string16> /* port_names */)