Add thunks for MojoDuplicateHandle[WithReducedRights]().

mojo/public/platform/native/system_thunks.c

 // Copyright 2013 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 "mojo/public/platform/native/system_thunks.h"
 
 #include <assert.h>
 
 #include "mojo/public/platform/native/thunk_export.h"
 
 static struct MojoSystemThunks g_thunks = {0};
 
 MojoTimeTicks MojoGetTimeTicksNow() {
   assert(g_thunks.GetTimeTicksNow);
   return g_thunks.GetTimeTicksNow();
 }
 
 MojoResult MojoClose(MojoHandle handle) {
   assert(g_thunks.Close);
   return g_thunks.Close(handle);
 }
 
 MojoResult MojoGetRights(MojoHandle handle, MojoHandleRights* rights) {
   assert(g_thunks.GetRights);
   return g_thunks.GetRights(handle, rights);
 }
 
+MojoResult MojoDuplicateHandleWithReducedRights(
+    MojoHandle handle,
+    MojoHandleRights rights_to_remove,
+    MojoHandle* new_handle) {
+  assert(g_thunks.DuplicateHandleWithReducedRights);
+  return g_thunks.DuplicateHandleWithReducedRights(handle, rights_to_remove,
+                                                   new_handle);
+}
+
+MojoResult MojoDuplicateHandle(MojoHandle handle, MojoHandle* new_handle) {
+  assert(g_thunks.DuplicateHandle);
+  return g_thunks.DuplicateHandle(handle, new_handle);
+}
+
 MojoResult MojoWait(MojoHandle handle,
                     MojoHandleSignals signals,
                     MojoDeadline deadline,
                     struct MojoHandleSignalsState* signals_state) {
   assert(g_thunks.Wait);
   return g_thunks.Wait(handle, signals, deadline, signals_state);
 }
 
 MojoResult MojoWaitMany(const MojoHandle* handles,
                         const MojoHandleSignals* signals,
@@ skipping 164 matching lines @@
   assert(g_thunks.UnmapBuffer);
   return g_thunks.UnmapBuffer(buffer);
 }
 
 THUNK_EXPORT size_t
 MojoSetSystemThunks(const struct MojoSystemThunks* system_thunks) {
   if (system_thunks->size >= sizeof(g_thunks))
     g_thunks = *system_thunks;
   return sizeof(g_thunks);
 }