Fix some spelling mistakes in comments.

net/log/net_log.cc

Index: net/log/net_log.cc
diff --git a/net/log/net_log.cc b/net/log/net_log.cc
index 01f2446a7ccbb64d77c3d84c8f5d704cebe53a69..98ad9cc11ce9f2f640478026b809b4dc08644198 100644
--- a/net/log/net_log.cc
+++ b/net/log/net_log.cc
@@ -17,7 +17,7 @@ namespace net {
 
 namespace {
 
-// Returns parameters for logging data transferred events. At a minum includes
+// Returns parameters for logging data transferred events. At a minimum includes
 // the number of bytes transferred. If the capture mode allows logging byte
 // contents and |byte_count| > 0, then will include the actual bytes. The
 // bytes are hex-encoded, since base::StringValue only supports UTF-8.