win vs2015: fix variable shadowing warnings in net/quic

net/quic/crypto/cert_compressor.cc

Index: net/quic/crypto/cert_compressor.cc
diff --git a/net/quic/crypto/cert_compressor.cc b/net/quic/crypto/cert_compressor.cc
index 95bb55378bb71b9c916c992d198d8e271ac86aa3..cb44d355a8dd357b04e6bcbb34ed08c981bb54be 100644
--- a/net/quic/crypto/cert_compressor.cc
+++ b/net/quic/crypto/cert_compressor.cc
@@ -195,10 +195,10 @@ vector<CertEntry> MatchCerts(const vector<string>& certs,
 
       uint64 hash = QuicUtils::FNV1a_64_Hash(i->data(), i->size());
       // This assumes that the machine is little-endian.
-      for (size_t i = 0; i < client_cached_cert_hashes.size();
-           i += sizeof(uint64)) {
+      for (size_t j = 0; j < client_cached_cert_hashes.size();
+           j += sizeof(uint64)) {
         uint64 cached_hash;
-        memcpy(&cached_hash, client_cached_cert_hashes.data() + i,
+        memcpy(&cached_hash, client_cached_cert_hashes.data() + j,
                sizeof(uint64));
         if (hash != cached_hash) {
           continue;