Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

content/browser/service_worker/service_worker_provider_host.h

Index: content/browser/service_worker/service_worker_provider_host.h
diff --git a/content/browser/service_worker/service_worker_provider_host.h b/content/browser/service_worker/service_worker_provider_host.h
index 0aa0cbc20856a44a1ae6326c03074f5bde19b6aa..9ef83ae77d6a75666cc22f5ca8986e187ccdef71 100644
--- a/content/browser/service_worker/service_worker_provider_host.h
+++ b/content/browser/service_worker/service_worker_provider_host.h
@@ -12,9 +12,14 @@
 #include "content/common/content_export.h"
 #include "webkit/common/resource_type.h"
 
+namespace ipc {
+class Sender;
+}
+
 namespace content {
 
 class ServiceWorkerContextCore;
+class ServiceWorkerDispatcherHost;
 class ServiceWorkerVersion;
 
 // This class is the browser-process representation of a serice worker
@@ -27,7 +32,8 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
  public:
   ServiceWorkerProviderHost(int process_id,
                             int provider_id,
-                            base::WeakPtr<ServiceWorkerContextCore> context);
+                            base::WeakPtr<ServiceWorkerContextCore> context,
+                            ServiceWorkerDispatcherHost* dispatcher_host);
   ~ServiceWorkerProviderHost();
 
   int process_id() const { return process_id_; }
@@ -57,8 +63,7 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
   void AddScriptClient(int thread_id);
   void RemoveScriptClient(int thread_id);
 
-  // Associate |version| to this provider as its '.active' or '.pending'
-  // version.
+  // Associate |version| to this provider as its '.active' or '.pending'.
   // Giving NULL to this method will unset the corresponding field.
   void SetActiveVersion(ServiceWorkerVersion* version);
   void SetPendingVersion(ServiceWorkerVersion* version);
@@ -80,6 +85,7 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
   scoped_refptr<ServiceWorkerVersion> pending_version_;
   scoped_refptr<ServiceWorkerVersion> hosted_version_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
+  ServiceWorkerDispatcherHost* dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerProviderHost);
 };