Add frame-specific InterfaceProviderSpec.

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>
@@ skipping 17 matching lines @@
   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>;
 
+// Convenience for reading a spec named |spec_name| out of |map|. If such a spec
+// is found, |spec| is modified and this function returns true. If a spec is not
+// found, |spec| is unmodified and this function returns false.
+bool GetInterfaceProviderSpec(const std::string& spec_name,
+                              const InterfaceProviderSpecMap& map,
+                              InterfaceProviderSpec* spec);
+
 }  // namespace service_manager
 
 #endif  // SERVICES_SERVICE_MANAGER_PUBLIC_CPP_INTERFACE_PROVIDER_SPEC_H_