[Background Sync] Use Mojo IPC to fire background sync events

content/renderer/service_worker/service_worker_script_context.h

Index: content/renderer/service_worker/service_worker_script_context.h
diff --git a/content/renderer/service_worker/service_worker_script_context.h b/content/renderer/service_worker/service_worker_script_context.h
index 9013795d09aa4aecb6c1bfef909cc8cdb1ee57ed..9d48ffdd81990d054ba38e247468d7d2fb6b091a 100644
--- a/content/renderer/service_worker/service_worker_script_context.h
+++ b/content/renderer/service_worker/service_worker_script_context.h
@@ -15,6 +15,7 @@
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "content/child/webmessageportchannel_impl.h"
+#include "content/common/background_sync_service.mojom.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "third_party/WebKit/public/platform/WebGeofencingEventType.h"
 #include "third_party/WebKit/public/platform/WebMessagePortChannel.h"
@@ -43,6 +44,8 @@ struct NavigatorConnectClient;
 struct PlatformNotificationData;
 struct ServiceWorkerClientInfo;
 
+using SyncCallback = mojo::Callback<void(BackgroundSyncEventStatus)>;
+
 // TODO(kinuko): This should implement WebServiceWorkerContextClient
 // rather than having EmbeddedWorkerContextClient implement it.
 // See the header comment in embedded_worker_context_client.h for the
@@ -102,6 +105,8 @@ class ServiceWorkerScriptContext {
   // in the browser process.
   int GetRoutingID() const;
 
+  void DispatchSyncEvent(const SyncCallback& callbacks);
+
  private:
   typedef IDMap<blink::WebServiceWorkerClientsCallbacks, IDMapOwnPointer>
       ClientsCallbacksMap;
@@ -111,11 +116,12 @@ class ServiceWorkerScriptContext {
       ClientCallbacksMap;
   typedef IDMap<blink::WebServiceWorkerSkipWaitingCallbacks, IDMapOwnPointer>
       SkipWaitingCallbacksMap;
+  typedef IDMap<const mojo::Callback<void(BackgroundSyncEventStatus)>,
+                IDMapExternalPointer> SyncEventCallbacksMap;
 
   void OnActivateEvent(int request_id);
   void OnInstallEvent(int request_id);
   void OnFetchEvent(int request_id, const ServiceWorkerFetchRequest& request);
-  void OnSyncEvent(int request_id);
   void OnNotificationClickEvent(
       int request_id,
       int64_t persistent_notification_id,
@@ -177,6 +183,9 @@ class ServiceWorkerScriptContext {
   // Pending callbacks for ClaimClients().
   ClaimClientsCallbacksMap pending_claim_clients_callbacks_;
 
+  // Pending callbacks for Background Sync Events
+  SyncEventCallbacksMap sync_event_callbacks_;
+
   // Capture timestamps for UMA
   std::map<int, base::TimeTicks> activate_start_timings_;
   std::map<int, base::TimeTicks> fetch_start_timings_;