Mitigate spoofing attempt using Latin letters.

components/url_formatter/top_domains/README

Index: components/url_formatter/top_domains/README
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+* alexa_domains.list
+  It is an input to make_top_domain_list and is made up of list of Alexa

[Peter Kasting, 2017/05/09 01:37:02]

Nit: "The Alexa top 10k domains, one per line, constructed by running
make_alexa_top_list.py.  Used as an input to make_top_domain_gperf."

I assume that "list" here and below should have been "gperf".

Also, be consistent about whether or not to use a newline between the bulleted
name above and the explanation here.

[jungshik at Google, 2017/05/10 18:05:12]

Thanks. Done

+  top 10k domains (one per line).
+  It's derived from
+   src/tools/perf/page_sets/alexa1-10000-urls.json with make_alexa_top_list.py
+
+* alexa_names_and_skeletons.gperf
+
+  It is generated by running make_top_domain_list and checked in.

[Peter Kasting, 2017/05/09 01:37:02]

Nit: "The checked-in output of make_top_domain_gperf.  Processed during the
build to generate alexa_names_and_skeletons-inc.cc, which is used by
url_formatter.cc.  This must be regenerated as follows if ICU is updated, since
skeletons can differ across ICU versions: <instructions>"

This makes me wonder if there should be a README note in the ICU directory that
says to regenerate this.

[jungshik at Google, 2017/05/10 18:05:12]

Thank you for a much better rewrite. 
I'll add it to README.chromium in third_party/icu. 

+  No command line argument needs to be passed.
+
+  When ICU is updated to a new major version, this file needs to be regenerated
+  because skeletons can be different in different ICU versions.
+
+  $ ninja -C $build_outdir make_top_domain_gperf
+  $ $build_outdir/make_top_domain_gperf
+
+  During a build, it is processed by net/tools/dafsa/make_dafsa.py to generate
+  alexa_names_and_skeletons-inc.cc that is included by
+  components/url_formatter/url_formatter.cc