Support reading multiple InterfaceProviderSpecs from manifests

services/service_manager/public/cpp/interface_provider_spec.h

 // Copyright 2016 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.
 
 #ifndef SERVICES_SERVICE_MANAGER_PUBLIC_CPP_INTERFACE_PROVIDER_SPEC_H_
 #define SERVICES_SERVICE_MANAGER_PUBLIC_CPP_INTERFACE_PROVIDER_SPEC_H_
 
 #include <map>
 #include <set>
 #include <string>
+#include <unordered_map>
 
 namespace service_manager {
 
 using Capability = std::string;
 using CapabilitySet = std::set<std::string>;
 using Interface = std::string;
 using InterfaceSet = std::set<std::string>;
 using Name = std::string;
 
 // See comments in
 // services/service_manager/public/interfaces/interface_provider_spec.mojom for
 // a description of InterfaceProviderSpec.
 struct InterfaceProviderSpec {
   InterfaceProviderSpec();
   InterfaceProviderSpec(const InterfaceProviderSpec& other);
   ~InterfaceProviderSpec();
   bool operator==(const InterfaceProviderSpec& other) const;
   bool operator<(const InterfaceProviderSpec& other) const;
   std::map<Capability, InterfaceSet> provides;
   std::map<Name, CapabilitySet> requires;
 };
 
+// Map of spec name -> spec.
+using InterfaceProviderSpecMap =
+    std::unordered_map<std::string, InterfaceProviderSpec>;
+
 }  // namespace service_manager
 
 #endif  // SERVICES_SERVICE_MANAGER_PUBLIC_CPP_INTERFACE_PROVIDER_SPEC_H_