SkLeanWindows.h: #include "Windows.h" fewer places

src/core/SkSemaphore.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+#include "../private/SkLeanWindows.h"
 #include "../private/SkSemaphore.h"
 
 #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
     #include <mach/mach.h>
     struct SkBaseSemaphore::OSSemaphore {
         semaphore_t fSemaphore;
 
         OSSemaphore()  {
             semaphore_create(mach_task_self(), &fSemaphore, SYNC_POLICY_LIFO, 0/*initial count*/);
         }
@@ skipping 45 matching lines @@
 }
 
 void SkBaseSemaphore::osWait() {
     fOSSemaphoreOnce([this] { fOSSemaphore = new OSSemaphore; });
     fOSSemaphore->wait();
 }
 
 void SkBaseSemaphore::cleanup() {
     delete fOSSemaphore;
 }