MacViews: Clip contents for non-rectangular windows.

ui/gfx/path_mac.h

 // Copyright 2016 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_MAC_H_
 #define UI_GFX_PATH_MAC_H_
 
+#import <Cocoa/Cocoa.h>
+
+#include "base/mac/scoped_cftyperef.h"
 #include "ui/gfx/gfx_export.h"
 
-@class NSBezierPath;
 class SkPath;
 
 namespace gfx {
 
 // Returns an autoreleased NSBezierPath corresponding to |path|. Caller should
 // call retain on the returned object, if it wishes to take ownership.
 GFX_EXPORT NSBezierPath* CreateNSBezierPathFromSkPath(const SkPath& path);
 
+// Returns an immutable CGPath corresponding to |path|. An empty CGPath is
+// returned for an empty or nil |path| value.
+GFX_EXPORT base::ScopedCFTypeRef<CGPathRef> CreateCGPathFromNSBezierPath(
+    NSBezierPath* path);
+
 }  // namespace gfx
 
 #endif  // UI_GFX_PATH_MAC_H_