Move to the new mx_vmo_syscall argument order

runtime/vm/virtual_memory_fuchsia.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_FUCHSIA)
 
 #include "vm/virtual_memory.h"
 
 #include <magenta/syscalls.h>
 #include <unistd.h>  // NOLINT
 
 #include "platform/assert.h"
 #include "vm/memory_region.h"
 #include "vm/os.h"
 
 namespace dart {
 
 uword VirtualMemory::page_size_ = 0;
 
 
 void VirtualMemory::InitOnce() {
   page_size_ = getpagesize();
 }
 
 
 VirtualMemory* VirtualMemory::ReserveInternal(intptr_t size) {
-  mx_handle_t vmo = mx_vmo_create(size);
-  if (vmo <= 0) {
+  mx_handle_t vmo = MX_HANDLE_INVALID;
+  mx_status_t status = mx_vmo_create(size, 0u, &vmo);
+  if (status != NO_ERROR) {
     return NULL;
   }
 
   // TODO(zra): map with PERM_NONE, when that works, and relax with
   // Commit and Protect when they are implemented.
   // Issue MG-161.
   const int prot = MX_VM_FLAG_PERM_READ |
                    MX_VM_FLAG_PERM_WRITE |
                    MX_VM_FLAG_PERM_EXECUTE;
   uintptr_t addr;
-  mx_status_t status = mx_process_map_vm(
+  status = mx_process_map_vm(
       mx_process_self(), vmo, 0, size, &addr, prot);
   if (status != NO_ERROR) {
     mx_handle_close(vmo);
     FATAL("VirtualMemory::ReserveInternal FAILED");
     return NULL;
   }
 
   MemoryRegion region(reinterpret_cast<void*>(addr), size);
   return new VirtualMemory(region, vmo);
 }
@@ skipping 33 matching lines @@
 
 
 bool VirtualMemory::Protect(void* address, intptr_t size, Protection mode) {
   // TODO(zra): Implement when Fuchsia has an mprotect-like call.
   return true;
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_FUCHSIA)