Switch to standard integer types in base/.

base/metrics/metrics_hashes.cc

Index: base/metrics/metrics_hashes.cc
diff --git a/base/metrics/metrics_hashes.cc b/base/metrics/metrics_hashes.cc
index b09ea4bde80cf43711c25f4d8be5e565e574dc73..73bce2e00b328c9620f1081ffb421ad95991ad26 100644
--- a/base/metrics/metrics_hashes.cc
+++ b/base/metrics/metrics_hashes.cc
@@ -12,7 +12,7 @@ namespace base {
 
 namespace {
 
-// Converts the 8-byte prefix of an MD5 hash into a uint64 value.
+// Converts the 8-byte prefix of an MD5 hash into a uint64_t value.
 inline uint64_t DigestToUInt64(const base::MD5Digest& digest) {
   uint64_t value;
   DCHECK_GE(sizeof(digest.a), sizeof(value));