win 2015: followup to https://codereview.chromium.org/941933002

net/quic/crypto/strike_register.cc

Index: net/quic/crypto/strike_register.cc
diff --git a/net/quic/crypto/strike_register.cc b/net/quic/crypto/strike_register.cc
index 702db7e9b46a22f467d56a23d7fbfcc23ea00c58..bc2dd69dc0b776c87a3e163495ee88038761f24c 100644
--- a/net/quic/crypto/strike_register.cc
+++ b/net/quic/crypto/strike_register.cc
@@ -499,10 +499,10 @@ void StrikeRegister::ValidateTree(
            j != bits.end(); j++) {
         unsigned byte = j->first / 8;
         DCHECK_LE(byte, 0xffu);
-        bit = j->first % 8;
+        unsigned new_bit = j->first % 8;
         static const uint8 kMasks[8] =
             {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
-        CHECK_EQ((bytes[byte] & kMasks[bit]) != 0, j->second);
+        CHECK_EQ((bytes[byte] & kMasks[new_bit]) != 0, j->second);
       }
     } else {
       uint32 inter = i->child(child);