Scaffolding for Android implementation of PaymentRequest.

content/public/common/service_registry.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_SERVICE_REGISTRY_H_
 #define CONTENT_PUBLIC_COMMON_SERVICE_REGISTRY_H_
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/strings/string_piece.h"
+#include "base/supports_user_data.h"
 #include "content/common/content_export.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace content {
 
 // A ServiceRegistry exposes local services that have been added using
 // AddService to a paired remote ServiceRegistry and provides local access to
 // services exposed by the remote ServiceRegistry through
 // ConnectToRemoteService.
-class CONTENT_EXPORT ServiceRegistry {
+class CONTENT_EXPORT ServiceRegistry : private base::SupportsUserData {

[ncarter (slow), 2016/04/05 18:22:40]

For SupportsUserData, instead of private inheritance on the content/public
interface, let's just use public inheritance on the implementation class,
ServiceRegistryImpl.

  public:
-  virtual ~ServiceRegistry() {}
+  ~ServiceRegistry() override {}
 
   // Make the service created by |service_factory| available to the remote
   // ServiceProvider. In response to each request for a service,
   // |service_factory| will be run with an InterfaceRequest<Interface>
   // representing that request. Adding a factory for an already registered
   // service will override the factory. Existing connections to the service are
   // unaffected.
   template <typename Interface>
   void AddService(const base::Callback<void(mojo::InterfaceRequest<Interface>)>
                       service_factory) {
@@ skipping 28 matching lines @@
   virtual void AddServiceOverrideForTesting(
       const std::string& service_name,
       const base::Callback<void(mojo::ScopedMessagePipeHandle)>&
           service_factory) = 0;
 
   // Removes all local service factories registered
   // by AddServiceOverrideForTesting. Used only for testing.
   virtual void ClearServiceOverridesForTesting() = 0;
 
  private:
+  friend class ServiceRegistryAndroid;
+
   template <typename Interface>
   static void ForwardToServiceFactory(
       const base::Callback<void(mojo::InterfaceRequest<Interface>)>
           service_factory,
       mojo::ScopedMessagePipeHandle handle) {
     service_factory.Run(mojo::MakeRequest<Interface>(std::move(handle)));
   }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_SERVICE_REGISTRY_H_