Enable overriding interface binders for any services running in current process.

services/service_manager/public/cpp/service_context.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 SERVICES_SERVICE_MANAGER_PUBLIC_CPP_SERVICE_CONTEXT_H_
 #define SERVICES_SERVICE_MANAGER_PUBLIC_CPP_SERVICE_CONTEXT_H_
 
 #include <map>
 #include <memory>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/system/core.h"
+#include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/service.h"
 #include "services/service_manager/public/interfaces/connector.mojom.h"
 #include "services/service_manager/public/interfaces/service.mojom.h"
 #include "services/service_manager/public/interfaces/service_control.mojom.h"
 
 namespace service_manager {
 
 // Encapsulates a connection to the Service Manager in two parts:
 //
@@ skipping 71 matching lines @@
   // receiving Service::OnServiceManagerConnectionLost().
   void DisconnectFromServiceManager();
 
   // Immediately severs the connection to the Service Manager and invokes the
   // quit closure (see SetQuitClosure() above) if one has been set.
   //
   // See comments on DisconnectFromServiceManager() regarding abrupt
   // disconnection from the Service Manager.
   void QuitNow();
 
+  // Overrides the interface binder for |interface_name| of |service_name|.
+  // This is a process-wide override, meaning that |binder| can intercept
+  // requests against only those |service_name| service instances running in the
+  // same process with caller of this function.
+  static void SetGlobalBinderForTesting(
+      const std::string& service_name,
+      const std::string& interface_name,
+      const BinderRegistry::Binder& binder,
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner = nullptr);
+
+  // Clears all overridden interface binders for service |service_name| set via
+  // SetGlobalBinderForTesting().
+  static void ClearGlobalBindersForTesting(const std::string& service_name);
+
  private:
   friend class service_manager::Service;
 
   // mojom::Service:
   void OnStart(const Identity& info, const OnStartCallback& callback) override;
   void OnBindInterface(const BindSourceInfo& source_info,
                        const std::string& interface_name,
                        mojo::ScopedMessagePipeHandle interface_pipe,
                        const OnBindInterfaceCallback& callback) override;
 
@@ skipping 16 matching lines @@
   base::Closure quit_closure_;
 
   base::WeakPtrFactory<ServiceContext> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceContext);
 };
 
 }  // namespace service_manager
 
 #endif  // SERVICES_SERVICE_MANAGER_PUBLIC_CPP_SERVICE_CONTEXT_H_