ImGui gates the OS clipboard behind a #define to avoid forcing ImGui
apps to link against ApplicationServices if they otherwise wouldn't need
to. In our case this is harmless; our tools already link against Cocoa.
This #define is safe to enable on all platforms.
Context:
29d9394a41
Change-Id: Ice5d027ddc0157c0cfe87a7cc0c064c4fa682425
Bug: skia:10338
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/300197
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
b5f7a07b77