Remove [Client=] annotation from ServiceProvider

mojo/public/cpp/bindings/interface_request.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 MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_REQUEST_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_REQUEST_H_
 
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 
 namespace mojo {
 
 // Used in methods that return instances of remote objects.
 template <typename Interface>
 class InterfaceRequest {
   MOJO_MOVE_ONLY_TYPE(InterfaceRequest)
  public:
   InterfaceRequest() {}
 
+  InterfaceRequest(decltype(nullptr)) {}
   InterfaceRequest(InterfaceRequest&& other) { handle_ = other.handle_.Pass(); }
+  InterfaceRequest& operator=(decltype(nullptr)) {
+    handle_.reset();
+    return *this;
+  }
   InterfaceRequest& operator=(InterfaceRequest&& other) {
     handle_ = other.handle_.Pass();
     return *this;
   }
 
   // Returns true if the request has yet to be completed.
   bool is_pending() const { return handle_.is_valid(); }
 
   void Bind(ScopedMessagePipeHandle handle) { handle_ = handle.Pass(); }
 
@@ skipping 31 matching lines @@
 template <typename Interface>
 InterfaceRequest<Interface> GetProxy(InterfacePtr<Interface>* ptr) {
   MessagePipe pipe;
   ptr->Bind(pipe.handle0.Pass());
   return MakeRequest<Interface>(pipe.handle1.Pass());
 }
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_REQUEST_H_