[proof-of-concept] SW thread independent of the main thread

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index 087ebe5ba0918e7c09be1a5ffeea2e956a7809c3..0a8854c89d2319231df6d238cab547190ba18aed 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -39,6 +39,7 @@
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "services/shell/public/cpp/interface_provider.h"
 #include "third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerEventResult.h"
+#include "third_party/WebKit/public/platform/modules/serviceworker/service_worker.mojom.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
@@ -60,6 +61,7 @@ class ServiceWorkerRegistration;
 class ServiceWorkerURLRequestJob;
 struct ServiceWorkerClientInfo;
 struct ServiceWorkerVersionInfo;
+class IsolatedWorkerInstance;
 
 // This class corresponds to a specific version of a ServiceWorker
 // script for a given pattern. When a script is upgraded, there may be
@@ -137,9 +139,7 @@ class CONTENT_EXPORT ServiceWorkerVersion
   int64_t registration_id() const { return registration_id_; }
   const GURL& script_url() const { return script_url_; }
   const GURL& scope() const { return scope_; }
-  EmbeddedWorkerStatus running_status() const {
-    return embedded_worker_->status();
-  }
+  EmbeddedWorkerStatus running_status() const;
   ServiceWorkerVersionInfo GetInfo();
   Status status() const { return status_; }
 
@@ -368,6 +368,16 @@ class CONTENT_EXPORT ServiceWorkerVersion
   // requests, in-progress streaming URLRequestJobs, or pending start callbacks.
   bool HasWork() const;
 
+  bool IsIsolatedWorker() const;
+  blink::mojom::IsolatedWorkerClientPtr& isolated_worker_ptr() {
+    return isolated_worker_client_;
+  }
+  void OnIsolatedWorkerStartFailed();
+  void OnIsolatedWorkerThreadStarted(
+      blink::mojom::IsolatedWorkerClientPtr lient);
+  void OnIsolatedWorkerScriptEvaluated();
+  void OnIsolatedWorkerStarted();
+
  private:
   friend class base::RefCounted<ServiceWorkerVersion>;
   friend class ServiceWorkerMetrics;
@@ -690,6 +700,7 @@ class CONTENT_EXPORT ServiceWorkerVersion
 
   Status status_ = NEW;
   std::unique_ptr<EmbeddedWorkerInstance> embedded_worker_;
+  std::unique_ptr<IsolatedWorkerInstance> isolated_worker_;
   std::vector<StatusCallback> start_callbacks_;
   std::vector<StatusCallback> stop_callbacks_;
   std::vector<base::Closure> status_change_callbacks_;
@@ -760,6 +771,7 @@ class CONTENT_EXPORT ServiceWorkerVersion
   // FinishStartWorker().
   base::Optional<ServiceWorkerMetrics::EventType> start_worker_first_purpose_;
 
+  blink::mojom::IsolatedWorkerClientPtr isolated_worker_client_;
   base::WeakPtrFactory<ServiceWorkerVersion> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerVersion);