Allow constructing a StrongBinding with an InterfacePtr*

mojo/public/cpp/bindings/strong_binding.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_STRONG_BINDING_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_
 
 #include "mojo/public/c/environment/async_waiter.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/error_handler.h"
@@ skipping 33 matching lines @@
   StrongBinding(
       Interface* impl,
       ScopedMessagePipeHandle handle,
       const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
       : StrongBinding(impl) {
     binding_.Bind(handle.Pass(), waiter);
   }
 
   StrongBinding(
       Interface* impl,
+      InterfacePtr<Interface>* ptr,
+      const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
+      : StrongBinding(impl) {
+    binding_.Bind(ptr, waiter);
+  }
+
+  StrongBinding(
+      Interface* impl,
       InterfaceRequest<Interface> request,
       const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
       : StrongBinding(impl) {
     binding_.Bind(request.Pass(), waiter);
   }
 
   ~StrongBinding() override {}
 
   bool WaitForIncomingMethodCall() {
     return binding_.WaitForIncomingMethodCall();
@@ skipping 15 matching lines @@
   }
 
  private:
   ErrorHandler* error_handler_ = nullptr;
   Binding<Interface> binding_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_