ServiceWorker: Implement StartWorker by using mojo

content/browser/service_worker/embedded_worker_instance.h

Index: content/browser/service_worker/embedded_worker_instance.h
diff --git a/content/browser/service_worker/embedded_worker_instance.h b/content/browser/service_worker/embedded_worker_instance.h
index 116456b4528ccafdd3f830da61a1b9cce0df1b2f..a9cfdd6989a88f802c1b96e309b941e3c7938472 100644
--- a/content/browser/service_worker/embedded_worker_instance.h
+++ b/content/browser/service_worker/embedded_worker_instance.h
@@ -23,6 +23,7 @@
 #include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/service_worker_metrics.h"
 #include "content/common/content_export.h"
+#include "content/common/service_worker/embedded_worker.mojom.h"
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "content/public/common/console_message_level.h"
 #include "url/gurl.h"
@@ -223,6 +224,16 @@ class CONTENT_EXPORT EmbeddedWorkerInstance {
                                      int worker_devtools_agent_route_id,
                                      bool wait_for_debugger);
 
+  // Called back from StartTask after a reference to the renderer registry is
+  // provided.
+  void OnGotRemoteEmbeddedWorkerInstanceClient(
+      std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
+      mojom::EmbeddedWorkerInstanceClientPtr client);
+
+  // Sends StartWorker message via Mojo.
+  void SendMojoStartWorker(
+      std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params);
+
   // Called back from StartTask after a start worker message is sent.
   void OnStartWorkerMessageSent();
 
@@ -307,6 +318,7 @@ class CONTENT_EXPORT EmbeddedWorkerInstance {
   int thread_id_;
   std::unique_ptr<shell::InterfaceRegistry> interface_registry_;
   std::unique_ptr<shell::InterfaceProvider> remote_interfaces_;
+  mojom::EmbeddedWorkerInstanceClientPtr instance_client_;
 
   // Whether devtools is attached or not.
   bool devtools_attached_;