PPAPI/NaCl: Make NaClIPCAdapter transfer handles more generally

ppapi/shared_impl/ppb_device_ref_shared.cc

 // Copyright (c) 2012 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 "ppapi/shared_impl/ppb_device_ref_shared.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "ppapi/shared_impl/host_resource.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/ppb_resource_array_shared.h"
@@ skipping 40 matching lines @@
   size_t size = devices.size();
   if (size > 0) {
     elements.reset(new PP_Resource[size]);
     for (size_t index = 0; index < size; ++index) {
       PPB_DeviceRef_Shared* device_object =
           new PPB_DeviceRef_Shared(type, instance, devices[index]);
       elements[index] = device_object->GetReference();
     }
   }
   PPB_ResourceArray_Shared* array_object =
-      new PPB_ResourceArray_Shared(type, instance, elements.get(), size);
+      new PPB_ResourceArray_Shared(type, instance, elements.get(),
+                                   static_cast<uint32_t>(size));
 
   for (size_t index = 0; index < size; ++index)
     PpapiGlobals::Get()->GetResourceTracker()->ReleaseResource(elements[index]);
 
   return array_object->GetReference();
 }
 
 }  // namespace ppapi