[Payments] Implement web payment app manifest

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 a41d24539c4d0d08b3f70a0c9328b7b76858048a..9adf6645fb28efef35cc82fdadd2328af6886b74 100644
--- a/content/browser/service_worker/service_worker_context_wrapper.h
+++ b/content/browser/service_worker/service_worker_context_wrapper.h
@@ -132,6 +132,10 @@ class CONTENT_EXPORT ServiceWorkerContextWrapper
   void HasMainFrameProviderHost(const GURL& origin,
                                 const BoolCallback& callback) const;
 
+  // Gets provider hosts render process and frame Ids for the given |origin|.

[falken, 2017/07/05 01:55:05]

// Returns all render process ids and frame ids for the given |origin|.

Please document this return value like this:
<int /* render process id */, int /* frame id */>

FYI this will also return a lot of frame_id == MSG_ROUTING_NONE, for
ServiceWorkerProviderHosts that are not hosting documents.

[gogerald1, 2017/07/05 02:26:04]

Done.

+  std::unique_ptr<std::vector<std::pair<int, int>>> GetProviderHostIds(
+      const GURL& origin) const;
+
   // Returns the registration whose scope longest matches |document_url|. It is
   // guaranteed that the returned registration has the activated worker.
   //