compositor_unittests target is unimplmented on Mac

ui/gfx/path.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_PATH_H_
 #define UI_GFX_PATH_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkPath.h"
@@ skipping 10 matching lines @@
     int y;
   };
 
   Path();
 
   // Creates a path populated with the specified points.
   Path(const Point* points, size_t count);
 
   ~Path();
 
-#if defined(OS_WIN) || defined(USE_X11)
+#if defined(USE_AURA) || defined(OS_WIN) || defined(USE_X11)
   // Creates a NativeRegion from the path. The caller is responsible for freeing
   // resources used by this region. This only supports polygon paths.
   NativeRegion CreateNativeRegion() const;
 
   // Returns the intersection of the two regions. The caller owns the returned
   // object.
   static gfx::NativeRegion IntersectRegions(gfx::NativeRegion r1,
                                             gfx::NativeRegion r2);
 
   // Returns the union of the two regions. The caller owns the returned object.
   static gfx::NativeRegion CombineRegions(gfx::NativeRegion r1,
                                           gfx::NativeRegion r2);
 
   // Returns the difference of the two regions. The caller owns the returned
   // object.
   static gfx::NativeRegion SubtractRegion(gfx::NativeRegion r1,
                                           gfx::NativeRegion r2);
 #endif
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Path);
 };
 
 }
 
 #endif  // UI_GFX_PATH_H_