Sync pki to chromium d740199e083b70d13506973c6f479f0b01165a05

This also removes fillins/check.h which is no longer needed.

Crbug: 1322914
Change-Id: If5e8355700472bf6703c80809ea276c4c07ddc52
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/62485
Auto-Submit: Bob Beck <bbe@google.com>
Commit-Queue: Bob Beck <bbe@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/pki/parse_values_unittest.cc b/pki/parse_values_unittest.cc
index 170224c..7eab66a 100644
--- a/pki/parse_values_unittest.cc
+++ b/pki/parse_values_unittest.cc
@@ -351,7 +351,7 @@
 
   EXPECT_EQ(1u, bit_string->unused_bits());
   EXPECT_EQ(1u, bit_string->bytes().Length());
-  EXPECT_EQ(0xFE, bit_string->bytes().UnsafeData()[0]);
+  EXPECT_EQ(0xFE, bit_string->bytes()[0]);
 
   EXPECT_TRUE(bit_string->AssertsBit(0));
   EXPECT_TRUE(bit_string->AssertsBit(1));