Add two interfaces for ServiceWorkerProviderContext/ProviderHost

content/common/service_worker/service_worker.mojom

Index: content/common/service_worker/service_worker.mojom
diff --git a/content/common/service_worker/service_worker.mojom b/content/common/service_worker/service_worker.mojom
index cadade0e8bc56d62b1f5ab18a0140839200d2d83..c5523d7e3b1501935ba3f0fb100913139f22d3f2 100644
--- a/content/common/service_worker/service_worker.mojom
+++ b/content/common/service_worker/service_worker.mojom
@@ -10,8 +10,11 @@ import "content/common/service_worker/service_worker_provider.mojom";
 // Each InterfacePtrs on the same render process will be bound to the same

[falken, 2017/05/18 04:13:10]

All InterfacePtrs on the same renderer process are bound to the same
mojom::ServiceWorkerDispatcherHost (or content::ServiceWorkerDispatcherHost??)

[shimazu, 2017/05/19 08:31:07]

Done.

 // ServiceWorkerDispatcherHost.

[falken, 2017/05/18 04:13:09]

Add sentence like: The renderer uses this interface to tell the browser when
potential service worker clients are created and when service workers are
starting up.

[shimazu, 2017/05/19 08:31:07]

Done.

 interface ServiceWorkerDispatcherHost {
+  // Creates a ServiceWorkerProviderHost on the browser process. |provider_info|
+  // have mojo endpoints to connect the provider host and the provider on the

[falken, 2017/05/18 04:13:10]

has Mojo endpoints

[shimazu, 2017/05/19 08:31:06]

Done.

+  // renderer together. The lifetime of ServiceWorkerProviderHost will be
+  // managed with the interface.

[falken, 2017/05/18 04:13:10]

"managed with the interface" -> "tied to this mojom::ServiceWorkerDispatcherHost
interface?"

[shimazu, 2017/05/19 08:31:07]

Done.

   OnProviderCreated(ServiceWorkerProviderHostInfo provider_info);
-  OnProviderDestroyed(int32 provider_id);
 
   // Informs the browser that a service worker is starting up. |provider_id|
   // identifies the ServiceWorkerProviderHost hosting the service