Teach EmbeddedWorkerInstance to create a process when it needs one.

content/browser/service_worker/service_worker_context_core.h

Index: content/browser/service_worker/service_worker_context_core.h
diff --git a/content/browser/service_worker/service_worker_context_core.h b/content/browser/service_worker/service_worker_context_core.h
index 2fae44124ec31409cc92d69f805a5b024fc79f69..a0df38bbb80d69f74b161e921187fba61f6b4063 100644
--- a/content/browser/service_worker/service_worker_context_core.h
+++ b/content/browser/service_worker/service_worker_context_core.h
@@ -34,6 +34,7 @@ namespace content {
 
 class EmbeddedWorkerRegistry;
 class ServiceWorkerContextObserver;
+class ServiceWorkerContextWrapper;
 class ServiceWorkerHandle;
 class ServiceWorkerJobCoordinator;
 class ServiceWorkerProviderHost;
@@ -84,6 +85,7 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   // ServiceWorkerContextCore, the methods of ServiceWorkerContextObserver will
   // be called on the thread which called AddObserver() of |observer_list|.
   ServiceWorkerContextCore(
+      ServiceWorkerContextWrapper* wrapper,
       const base::FilePath& user_data_directory,
       quota::QuotaManagerProxy* quota_manager_proxy,
       ObserverListThreadSafe<ServiceWorkerContextObserver>* observer_list);
@@ -105,6 +107,7 @@ class CONTENT_EXPORT ServiceWorkerContextCore
                                       int line_number,
                                       const GURL& source_url) OVERRIDE;
 
+  ServiceWorkerContextWrapper* wrapper() { return wrapper_.get(); }
   ServiceWorkerStorage* storage() { return storage_.get(); }
   EmbeddedWorkerRegistry* embedded_worker_registry() {
     return embedded_worker_registry_.get();
@@ -163,6 +166,7 @@ class CONTENT_EXPORT ServiceWorkerContextCore
       ServiceWorkerRegistration* registration,
       ServiceWorkerVersion* version);
 
+  scoped_refptr<ServiceWorkerContextWrapper> wrapper_;
   ProcessToProviderMap providers_;
   scoped_ptr<ServiceWorkerStorage> storage_;
   scoped_refptr<EmbeddedWorkerRegistry> embedded_worker_registry_;