Bug 1676479 - Turn on WebRender on Intel gen5 on Nightly. r=aosmond

Differential Revision: https://phabricator.services.mozilla.com/D96619

widget/GfxDriverInfo.cpp

@@ -495,6 +495,12 @@ const GfxDeviceFamily* GfxDriverInfo::GetDeviceFamily(DeviceFamily id) {
       APPEND_RANGE(0x06c0, INT32_MAX);
       break;
     case DeviceFamily::IntelRolloutWebRender:
+#ifdef NIGHTLY_BUILD
+      // gen5 (ironlake)
+      APPEND_DEVICE(0x0042);
+      APPEND_DEVICE(0x0046);
+#endif
+
 #ifdef EARLY_BETA_OR_EARLIER
       // cherryview
       APPEND_DEVICE(0x22b0);