MacViews: Add native drop shadow to dialogs on OSX < 10.10.

ui/gfx/path_mac.h

Index: ui/gfx/path_mac.h
diff --git a/ui/gfx/path_mac.h b/ui/gfx/path_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..8c050056013d1d27238c93ba29aae65e591cfa7f
--- /dev/null
+++ b/ui/gfx/path_mac.h
@@ -0,0 +1,20 @@
+// 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_
+
+#include "ui/gfx/gfx_export.h"
+
+@class NSBezierPath;
+class SkPath;
+
+namespace gfx {
+
+// Returns the NSBezierPath corresponding to |path|.

[msw, 2016/02/11 23:57:37]

nit: document ownership (or need to CFRelease, or similar).
Maybe return a base::scoped_nsobject or similar?

[karandeepb, 2016/02/12 03:45:51]

Done. Have documented that this returns an autoreleased pointer, which can be
retained by the caller if needed. Don't think we should return a
base::scoped_nsobject. It's conventional to return autoreleased pointers on Mac
and use base::scoped_nsobjects as part of method arguments, when we need to
transfer ownership.

[msw, 2016/02/12 19:26:55]

I'm not familiar with this convention, but I'll trust you and Trent on it.

+GFX_EXPORT NSBezierPath* CreateNSBezierPathFromSkPath(const SkPath& path);
+
+}  // namespace gfx
+
+#endif  // UI_GFX_PATH_MAC_H_