Non-tree-shaking --precompile.

runtime/vm/vm_sources.gypi

 # Copyright (c) 2013, 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.
 
 # This file contains all sources (vm and tests) for the dart virtual machine.
 # Unit test files need to have a '_test' suffix appended to the name.
 {
   'sources': [
     'allocation.cc',
     'allocation.h',
@@ skipping 317 matching lines @@
     'os_win.cc',
     'pages.cc',
     'pages.h',
     'pages_test.cc',
     'parser.cc',
     'parser.h',
     'parser_test.cc',
     'port.cc',
     'port.h',
     'port_test.cc',
+    'precompiler.cc',
+    'precompiler.h',
+    'proccpuinfo.cc',
     'proccpuinfo.h',
-    'proccpuinfo.cc',
     'profiler_service.cc',
     'profiler_service.h',
     'profiler_test.cc',
     'profiler.cc',
     'profiler.h',
     'random.cc',
     'random.h',
     'raw_object.cc',
     'raw_object.h',
     'raw_object_snapshot.cc',
@@ skipping 141 matching lines @@
     'vtune.h',
     'weak_code.cc',
     'weak_code.h',
     'weak_table.cc',
     'weak_table.h',
     'zone.cc',
     'zone.h',
     'zone_test.cc',
   ],
 }