2 files changed, 14 insertions, 6 deletions
diff --git a/net/tools/tld_cleanup/README b/net/tools/tld_cleanup/README
index 8eab5ee..f696843 100644
--- a/net/tools/tld_cleanup/README
+++ b/net/tools/tld_cleanup/README
@@ -1,3 +1,12 @@
-When updating src/net/base/effective_tld_names.dat, re-run tld_cleanup which
-will re-generate src/net/base/effective_tld_names.cc.  Check in the updated
-effective_tld_names.dat and effective_tld_names.cc together.
-\ No newline at end of file
+When updating src/net/base/effective_tld_names.dat:
+
+1. Build tld_cleanup.exe (the "(net)" > "tld_cleanup" project)
+2. Run it (no arguments needed), typically from src/chrome/Release or
+   src/chrome/Debug. It will re-generate
+   src/net/base/effective_tld_names.gperf.
+3. Run gperf on the new effective_tld_names.gperf:
+     gperf -a -L "C++" -C -c -o -t -k '*' -NFindDomain -D -m 5 \
+        effective_tld_names.gperf > effective_tld_names.cc
+   It will produce a new effective_tld_names.cc.
+4. Check in the updated effective_tld_names.dat, effective_tld_names.gperf,
+   and effective_tld_names.cc together.
diff --git a/net/tools/tld_cleanup/tld_cleanup.cc b/net/tools/tld_cleanup/tld_cleanup.cc
index 8a427ca..e98b95d 100644
--- a/net/tools/tld_cleanup/tld_cleanup.cc
+++ b/net/tools/tld_cleanup/tld_cleanup.cc
@@ -8,9 +8,8 @@
 // generate a perfect hash map.  The benefit of this approach is that no time is
 // spent on program initialization to generate the map of this data.
 //
-// After running this program, "effective_tld_names.gperf" is generated.  Run
-// gperf using the following command line:
-//   gperf -a -L "C++" -C -c -o -t -k '*' -NFindDomain -D -m 5 effective_tld_names.gperf > effective_tld_names.c
+// Running this program finds "effective_tld_names.cc" in the expected location
+// in the source checkout and generates "effective_tld_names.gperf" next to it.
 //
 // Any errors or warnings from this program are recorded in tld_cleanup.log.
 //