Service Worker: Add Clients.get(id)

content/browser/service_worker/service_worker_client_utils.h

Index: content/browser/service_worker/service_worker_client_utils.h
diff --git a/content/browser/service_worker/service_worker_client_utils.h b/content/browser/service_worker/service_worker_client_utils.h
index 258268e1e0d2cbe93c698a3970add5fddb7fd2a8..05659d95d0ad7e32c913e8835323595fe2efd018 100644
--- a/content/browser/service_worker/service_worker_client_utils.h
+++ b/content/browser/service_worker/service_worker_client_utils.h
@@ -27,6 +27,7 @@ using NavigationCallback =
     base::Callback<void(ServiceWorkerStatusCode status,
                         const std::string& client_uuid,
                         const ServiceWorkerClientInfo& client_info)>;
+using ClientCallback = base::Callback<void(const ServiceWorkerClientInfo&)>;
 using ServiceWorkerClients = std::vector<ServiceWorkerClientInfo>;
 using ClientsCallback = base::Callback<void(ServiceWorkerClients* clients)>;
 
@@ -47,6 +48,13 @@ void NavigateClient(const GURL& url,
                     const base::WeakPtr<ServiceWorkerContextCore>& context,
                     const NavigationCallback& callback);
 
+// Gets a client matched by |id|. |callback| is called with the client
+// information on completion.
+void GetClient(const base::WeakPtr<ServiceWorkerVersion>& controller,
+               const std::string& id,

[nhiroki, 2016/02/03 09:39:59]

I'd prefer "client_uuid" to "id" because this class handles some ids
(process_id, frame_id) and other classes (eg. ServiceWorkerClientInfo) name this
"client_uuid".

[jungkees, 2016/02/03 14:15:07]

Agreed. Addressed.

+               const base::WeakPtr<ServiceWorkerContextCore>& context,
+               const ClientCallback& callback);
+
 // Collects clients matched with |options|. |callback| is called with the client
 // information sorted in MRU order (most recently focused order) on completion.
 void GetClients(const base::WeakPtr<ServiceWorkerVersion>& controller,