Support reading multiple InterfaceProviderSpecs from manifests

services/service_manager/public/interfaces/service.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module service_manager.mojom;
 
 import "services/service_manager/public/interfaces/connector.mojom";
 import "services/service_manager/public/interfaces/interface_provider.mojom";
 import "services/service_manager/public/interfaces/interface_provider_spec.mojom";
 
+// Metadata describing an instance of a service.
+struct ServiceInfo {
+  // The service's identity.
+  Identity identity;
+
+  // The service's interface provider specs, from its manifest.
+  map<string, InterfaceProviderSpec> interface_provider_specs;
+};
+
 // Implemented by any service which is known to the Service Manager, for which
 // instances may be tracked. It allows the implementor to receive lifecycle
 // events and service inbound connection attempts.
 interface Service {
   // Called by the service manager once an instance for this service has been
   // created. This method will be called exactly once before any other method is
   // called.
   //
   // Parameters:
   //
   //  identity
   //    The identity of this instance in the service manager. Includes:
   //    * The resolved name used in the connection request that resulted in this
   //      instance being initialized.
   //    * The user associated with this instance in the service manager. This
   //      will never be kInheritUserID.
   //    * The instance group this instance belongs to.
   //
   // Response parameters:
   //
   //  connector_request
   //    An optional Connector request for the service manager to bind, allowing
   //    the initialized client to connect to others.
   //
-  OnStart(Identity identity) => (Connector&? connector_request);
+  OnStart(ServiceInfo info) => (Connector&? connector_request);
 
   // Called when another service attempts to open a connection to this
   // service. A service implements this method to complete the exchange
   // of interface implementations with the remote service. See also
   // documentation in service_manager.mojom for Connect(). The service
   // originating the request is referred to as the "source" and the one
   // receiving the "target".
   //
   // Parameters:
   //
-  //  source
-  //    The identity of the instance originating the connection.
+  //  source_info
+  //    Contains the source identity and interface provider specs.
   //
   //  interfaces
   //    A request for an InterfaceProvider by which the source service may
   //    seek to bind interface implementations exported by the target.
   //
   //  required_interfaces
   //    A whitelist of interface names that should be made available to the
   //    source that initiated the connection, in accordance to policy described
   //    in the source & target's service manifests. Attempts to bind interfaces
   //    not in this whitelist must not be fulfilled.
   //
   //  required_capabilities
   //    A set of the capability names required by the source initiating the
   //    connection. |required_interfaces| controls interface binding, so this
   //    is useful mostly if the target wishes to control behavior based on the
   //    presence of a value in this set.
   //
-  OnConnect(Identity source,
+  OnConnect(ServiceInfo source_info,
             InterfaceProvider&? interfaces,
             InterfaceSet required_interfaces,
             CapabilitySet required_capabilities);
 };