Mojo: Expose untyped associated endpoints through public API

mojo/public/cpp/bindings/associated_interface_ptr.h

 // Copyright 2015 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 MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_H_
 
 #include <stdint.h>
 #include <utility>
 
@@ skipping 50 matching lines @@
   // scheduling.
   //
   // NOTE: Please see the comments of
   // AssociatedGroup.CreateAssociatedInterface() about when you can use this
   // object to make calls.
   void Bind(AssociatedInterfacePtrInfo<Interface> info,
             scoped_refptr<base::SingleThreadTaskRunner> runner =
                 base::ThreadTaskRunnerHandle::Get()) {
     reset();
 
-    bool is_local =
-        internal::AssociatedInterfacePtrInfoHelper::GetHandle(&info).is_local();
+    bool is_local = info.handle().is_local();
 
     DCHECK(is_local) << "The AssociatedInterfacePtrInfo is supposed to be used "
                         "at the other side of the message pipe.";
 
     if (info.is_valid() && is_local)
       internal_state_.Bind(std::move(info), std::move(runner));
   }
 
   bool is_bound() const { return internal_state_.is_bound(); }
 
@@ skipping 116 matching lines @@
   group->CreateAssociatedInterface(AssociatedGroup::WILL_PASS_REQUEST,
                                    &ptr_info, &request);
 
   ptr->Bind(std::move(ptr_info), std::move(runner));
   return request;
 }
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_H_