Share precompiled header setup for blink between Windows and Mac.

third_party/WebKit/Source/platform/mac/ThemeMac.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ThemeMac_h
 #define ThemeMac_h
 
+#import <Cocoa/Cocoa.h>
+
 #include "platform/Theme.h"
 
 namespace blink {
 
 class ThemeMac : public Theme {
  public:
   ThemeMac() {}
   ~ThemeMac() override {}
 
   virtual int baselinePositionAdjustment(ControlPart) const;
@@ skipping 73 matching lines @@
   static PLATFORM_EXPORT NSControlSize
   controlSizeFromPixelSize(const IntSize* sizes,
                            const IntSize& minZoomedSize,
                            float zoomFactor);
   static PLATFORM_EXPORT const IntSize* stepperSizes();
 };
 
 }  // namespace blink
 
 #endif  // ThemeMac_h