Bug 1807403 - Blocklist WebGPU on all macOS. r=gfx-reviewers,aosmond

WGPU doesn't have bounds checks on Metal yet, so WebGPU is too unsafe to
expose by default for now.

Differential Revision: https://phabricator.services.mozilla.com/D170702

widget/cocoa/GfxInfo.mm

@@ -410,6 +410,11 @@ const nsTArray<GfxDriverInfo>& GfxInfo::GetGfxDriverInfo() {
     IMPLEMENT_MAC_DRIVER_BLOCKLIST(
         OperatingSystem::OSX, DeviceFamily::IntelSandyBridge, nsIGfxInfo::FEATURE_WEBRENDER,
         nsIGfxInfo::FEATURE_BLOCKED_DEVICE, "FEATURE_FAILURE_INTEL_MAC_HD3000_NO_WEBRENDER");
+
+    // wgpu doesn't safely support OOB behavior on Metal yet.
+    IMPLEMENT_MAC_DRIVER_BLOCKLIST(OperatingSystem::OSX, DeviceFamily::All,
+                                   nsIGfxInfo::FEATURE_WEBGPU, nsIGfxInfo::FEATURE_BLOCKED_DEVICE,
+                                   "FEATURE_FAILURE_MAC_WGPU_NO_METAL_BOUNDS_CHECKS");
   }
   return *sDriverInfo;
 }