github/google/gfbuild-angle/192da9d76fef6012245473c92b9dfcb607848e6a

Automated build for angle version 192da9d76fef6012245473c92b9dfcb607848e6a.

• 192da9d76 - Use newer OSX SDK for iOS
• ee89849b7 - Metal: Fixed memory leak due to the CAMetalLayer still attached to super layer
• 5f5292c86 - Only enable robust client memory if the context supports validation.