Separate Remote InterfaceProvider again, and add a new client lib type for it.

services/shell/public/cpp/tests/interface_registry_unittest.cc

 // 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.
 
 #include "services/shell/public/cpp/interface_registry.h"
 
 #include "base/message_loop/message_loop.h"
 #include "services/shell/public/cpp/interface_binder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 24 matching lines @@
     test_api.SetInterfaceBinderForName(new TestBinder(&delete_count), "TC1");
   }
   EXPECT_EQ(1, delete_count);
 
   // Removal.
   {
     std::unique_ptr<InterfaceRegistry> registry(new InterfaceRegistry(nullptr));
     InterfaceBinder* b = new TestBinder(&delete_count);
     InterfaceRegistry::TestApi test_api(registry.get());
     test_api.SetInterfaceBinderForName(b, "TC1");
-    test_api.RemoveInterfaceBinderForName("TC1");
+    registry->RemoveInterface("TC1");
     registry.reset();
     EXPECT_EQ(2, delete_count);
   }
 
   // Multiple.
   {
     InterfaceRegistry registry(nullptr);
     InterfaceRegistry::TestApi test_api(&registry);
     test_api.SetInterfaceBinderForName(new TestBinder(&delete_count), "TC1");
     test_api.SetInterfaceBinderForName(new TestBinder(&delete_count), "TC2");
   }
   EXPECT_EQ(4, delete_count);
 
   // Re-addition.
   {
     InterfaceRegistry registry(nullptr);
     InterfaceRegistry::TestApi test_api(&registry);
     test_api.SetInterfaceBinderForName(new TestBinder(&delete_count), "TC1");
     test_api.SetInterfaceBinderForName(new TestBinder(&delete_count), "TC1");
     EXPECT_EQ(5, delete_count);
   }
   EXPECT_EQ(6, delete_count);
 }
 
 }  // namespace
 }  // namespace internal
 }  // namespace shell