Prepare for removal of source_filter.gypi:

runtime/platform/thread_win.cc

 // Copyright (c) 2012, 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 "platform/globals.h"
+#if defined(TARGET_OS_WINDOWS)
+
 #include "platform/thread.h"
 
-#include <process.h>
+#include <process.h>  // NOLINT
 
 #include "platform/assert.h"
 
 namespace dart {
 
 class ThreadStartData {
  public:
   ThreadStartData(Thread::ThreadStartFunction function, uword parameter)
       : function_(function), parameter_(parameter) {}
 
@@ skipping 311 matching lines @@
 void Monitor::NotifyAll() {
   // If one of the objects in the list of waiters wakes because of a
   // timeout before we signal it, that object will get an extra
   // signal. This will be treated as a spurious wake-up and is OK
   // since all uses of monitors should recheck the condition after a
   // Wait.
   data_.SignalAndRemoveAllWaiters();
 }
 
 }  // namespace dart
+
+#endif  // defined(TARGET_OS_WINDOWS)