Workaround win2019 bad bit field code gen

Change-Id: I51130e4a0f62eb9e803710c23a7c5efda6b48012
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529607
Reviewed-by: Arman Uguray <armansito@google.com>
Commit-Queue: Herb Derby <herb@google.com>
diff --git a/src/core/SkGlyph.h b/src/core/SkGlyph.h
index f4aea2f..bb0520e 100644
--- a/src/core/SkGlyph.h
+++ b/src/core/SkGlyph.h
@@ -273,11 +273,11 @@
 private:
     static_assert(SkPackedGlyphID::kEndData == 20);
     struct {
-        uint32_t fIndex     : SkPackedGlyphID::kEndData;
-        bool fIsEmpty       : 1;
-        bool fIsColor       : 1;
-        bool fCanDrawAsMask : 1;
-        bool fCanDrawAsSDFT : 1;
+        uint32_t fIndex         : SkPackedGlyphID::kEndData;
+        uint32_t fIsEmpty       : 1;
+        uint32_t fIsColor       : 1;
+        uint32_t fCanDrawAsMask : 1;
+        uint32_t fCanDrawAsSDFT : 1;
     };
     SkGlyphRect fBounds;
 };