Add thunks for MojoDuplicateHandle[WithReducedRights]().

mojo/edk/embedder/system_impl_private_entrypoints.cc

 // 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.
 
 #include "base/logging.h"
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/core.h"
 #include "mojo/edk/system/dispatcher.h"
 #include "mojo/edk/system/handle.h"
 #include "mojo/edk/util/ref_ptr.h"
@@ skipping 82 matching lines @@
 }
 
 MojoResult MojoSystemImplGetRights(MojoSystemImpl system,
                                    MojoHandle handle,
                                    MojoHandleRights* rights) {
   mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
   DCHECK(core);
   return core->GetRights(handle, MakeUserPointer(rights));
 }
 
+MojoResult MojoSystemImplDuplicateHandleWithReducedRights(
+    MojoSystemImpl system,
+    MojoHandle handle,
+    MojoHandleRights rights_to_remove,
+    MojoHandle* new_handle) {
+  mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
+  DCHECK(core);
+  return core->DuplicateHandleWithReducedRights(handle, rights_to_remove,
+                                                MakeUserPointer(new_handle));
+}
+
+MojoResult MojoSystemImplDuplicateHandle(MojoSystemImpl system,
+                                         MojoHandle handle,
+                                         MojoHandle* new_handle) {
+  mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
+  DCHECK(core);
+  return core->DuplicateHandleWithReducedRights(handle, MOJO_HANDLE_RIGHT_NONE,
+                                                MakeUserPointer(new_handle));
+}
+
 MojoResult MojoSystemImplWait(MojoSystemImpl system,
                               MojoHandle handle,
                               MojoHandleSignals signals,
                               MojoDeadline deadline,
                               MojoHandleSignalsState* signals_state) {
   mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
   DCHECK(core);
   return core->Wait(handle, signals, deadline, MakeUserPointer(signals_state));
 }
 
@@ skipping 210 matching lines @@
                          MakeUserPointer(buffer), flags);
 }
 
 MojoResult MojoSystemImplUnmapBuffer(MojoSystemImpl system, void* buffer) {
   mojo::system::Core* core = static_cast<mojo::system::Core*>(system);
   DCHECK(core);
   return core->UnmapBuffer(MakeUserPointer(buffer));
 }
 
 }  // extern "C"