[ServiceWorker] Add EmbeddedWorkerInstanceHost Interface.

content/common/service_worker/embedded_worker.mojom

 // Copyright 2016 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.
 
 module content.mojom;
 
 import "content/common/service_worker/service_worker_event_dispatcher.mojom";
+import "mojo/common/string16.mojom";
 import "services/service_manager/public/interfaces/interface_provider.mojom";
 import "third_party/WebKit/public/web/console_message.mojom";
 import "url/mojo/url.mojom";
 
 [Native]
 struct EmbeddedWorkerStartParams;
 
 // Interface to control a renderer-side worker's environment.
 interface EmbeddedWorkerInstanceClient {
   StartWorker(EmbeddedWorkerStartParams params,
-              ServiceWorkerEventDispatcher& dispatcher_request);
+              ServiceWorkerEventDispatcher& dispatcher_request,
+              associated EmbeddedWorkerInstanceHost instance_host);
   StopWorker() => ();

[shimazu, 2017/04/06 05:01:36]

I think we don't need to have the callback because we already have OnStopped.
Could you remove that and add a comment about that?

[leonhsl(Using Gerrit), 2017/04/06 09:58:55]

Done.
Yeah I was confused about this.. Thanks for the clarification!

   ResumeAfterDownload();
   AddMessageToConsole(blink.mojom.ConsoleMessageLevel level,
                       string message);
-};
+};
+
+// Interface to control a browser-side embedded worker instance, be associated
+// with interface EmbeddedWorkerInstanceClient.
+interface EmbeddedWorkerInstanceHost {
+  // Sent on main thread.
+  // Indicate that the worker is ready for inspection.
+  OnReadyForInspection();
+  // Indicate that the worker has loaded the script.
+  OnScriptLoaded();
+  // Indicate that the worker has failed to load the script.
+  OnScriptLoadFailed();
+  // Indicate that the worker is stopped.
+  OnStopped();
+
+  // Sent on worker thread.
+  // Indicate that the worker thread is started.
+  OnThreadStarted(int32 thread_id, int32 provider_id);
+  // Indicate that the worker has evaluated the script.
+  OnScriptEvaluated(bool success);
+  // Indicate that the worker is started.
+  OnStarted();
+  // Report an exception.
+  OnReportException(mojo.common.mojom.String16 error_message, int32 line_number,
+                    int32 column_number, url.mojom.Url source_url);
+  // Report console message.
+  OnReportConsoleMessage(int32 source_identifier, int32 message_level,
+                         mojo.common.mojom.String16 message, int32 line_number,
+                         url.mojom.Url source_url);
+};