Teach EmbeddedWorkerInstance to create a process when it needs one.

content/browser/service_worker/service_worker_context_wrapper.h

Index: content/browser/service_worker/service_worker_context_wrapper.h
diff --git a/content/browser/service_worker/service_worker_context_wrapper.h b/content/browser/service_worker/service_worker_context_wrapper.h
index cea9c06a4d07cc4ed8e9bdf7a32cf687bf796c17..bd83210679bad8f0421b844caf46995e6f4365bb 100644
--- a/content/browser/service_worker/service_worker_context_wrapper.h
+++ b/content/browser/service_worker/service_worker_context_wrapper.h
@@ -5,6 +5,8 @@
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 
+#include <vector>
+
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -22,6 +24,8 @@ class QuotaManagerProxy;
 
 namespace content {
 
+class BrowserContext;
+class ServiceWorkerContextCore;
 class ServiceWorkerContextObserver;
 
 // A refcounted wrapper class for our core object. Higher level content lib
@@ -32,7 +36,7 @@ class CONTENT_EXPORT ServiceWorkerContextWrapper
     : NON_EXPORTED_BASE(public ServiceWorkerContext),
       public base::RefCountedThreadSafe<ServiceWorkerContextWrapper> {
  public:
-  ServiceWorkerContextWrapper();
+  ServiceWorkerContextWrapper(BrowserContext* browser_context);
 
   // Init and Shutdown are for use on the UI thread when the profile,
   // storagepartition is being setup and torn down.
@@ -44,12 +48,10 @@ class CONTENT_EXPORT ServiceWorkerContextWrapper
   ServiceWorkerContextCore* context();
 
   // ServiceWorkerContext implementation:
-  virtual void RegisterServiceWorker(const GURL& pattern,
-                                     const GURL& script_url,
-                                     int source_process_id,
-                                     const ResultCallback& continuation)
-      OVERRIDE;
-
+  virtual void RegisterServiceWorker(
+      const GURL& pattern,
+      const GURL& script_url,
+      const ResultCallback& continuation) OVERRIDE;
   virtual void UnregisterServiceWorker(const GURL& pattern,
                                        int source_process_id,
                                        const ResultCallback& continuation)
@@ -60,11 +62,14 @@ class CONTENT_EXPORT ServiceWorkerContextWrapper
 
  private:
   friend class base::RefCountedThreadSafe<ServiceWorkerContextWrapper>;
+  friend class ServiceWorkerProcessManager;
   virtual ~ServiceWorkerContextWrapper();
 
-  scoped_ptr<ServiceWorkerContextCore> context_core_;
-  scoped_refptr<ObserverListThreadSafe<ServiceWorkerContextObserver> >
+  const scoped_refptr<ObserverListThreadSafe<ServiceWorkerContextObserver> >
       observer_list_;
+  // Cleared in Shutdown():
+  BrowserContext* browser_context_;
+  scoped_ptr<ServiceWorkerContextCore> context_core_;
 };
 
 }  // namespace content