Fix mac TSAN build

Change-Id: If0eabff73f6de8877d8eb7444bc1f1d75a1b578c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263708
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index fa9adc5..4462e72 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -3318,7 +3318,8 @@
     // See skbug.com/7058
     fMapBufferType = kNone_MapBufferType;
     fMapBufferFlags = kNone_MapFlags;
-    fTransferBufferSupport = false;
+    fTransferFromBufferToTextureSupport = false;
+    fTransferFromSurfaceToBufferSupport = false;
     fTransferBufferType = kNone_TransferBufferType;
 #endif
 #endif