ICU update to 54.1 step 7

README.chromium

 Name: icu
 URL: http://site.icu-project.org/
 Version: 54.1
 License: MIT
 Security Critical: yes
 
 WARNING: The head of third_party/icu is in the middle of upgrading to ICU 54.1
 and it's NOT usable for Chromium/Blink/v8.
  - DO NOT deps-roll ICU to the head.
  - If there is a critical change to make (e.g. security), a branch can be cut
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         language for a locale in its native language.
       c. Remove the legacy Chinese character set-based collation
          (big5han/gb2312han) that don't make any sense and nobdoy uses.
 
   - Add tg.txt, ckb.txt, and ku.txt to source/data/{locale,lang}
     with the minimal locale data necessary for spellchecker and
     and language menus. Also change the English display name
     for ckb to 'Kurdish (Arabic)'.
 
   - android/patch_locale.sh (to be run for Android build only):
-      a. Make changes to source/data/{curr,region,lang} to exclude these data
+      a. Make changes to source/data/{region,lang} to exclude these data
          except the language and script names of zh_Hans and zh_Hant.
-      b. Remove exemplar cities in timezone data (data/zone)
-      c. Keep only the minimal calendar data in data/locales
+      b. Remove exemplar cities in timezone data (data/zone).
+      c. Keep only the minimal calendar data in data/locales.
+      d. Include currency display names for a smaller subset of currencies.
+      e. Minimize the locale data for 9 locales to which Chrome on Android
+         is not localized.
 
 6. Timezone data update
   - Grab the latest version of the following timezone data files and
     put them in source/data/misc.
 
      metaZones.txt
      timezoneTypes.txt
      windowsZones.txt
      zoneinfo64.txt
 
    As of January 2015, the latest version is 2014j and the above files
    are available at
    http://source.icu-project.org/repos/icu/data/trunk/tzdata/icunew/2014j/44/
 
 7. Transliterator customization
 
    - Also add css3transform.txt to source/data/trnslit.
    - Put the following line in trnslocal.mk
 
      TRANSLIT_SOURCE=css3transform.txt
 
 8. Build-related changes
 
   - patches/wpo.patch
     upstream bugs : http://bugs.icu-project.org/trac/ticket/8043
                     http://bugs.icu-project.org/trac/ticket/5701
   - patches/vscomp.patch for building with Visual Studio on Windows.
      a. do not use WINDOWS_LOCALE_API in locmap.c
      b. do not redefine stringpiece::npos
+     c. Fix 'signed vs unsigned comparison' warning in
+        collationfastlatin.cpp. The upstream ToT does not have these lines
+        any more.
+     d. Add static_cast to avoid a possible data truncatiion warning 
+        upstream bug: http://bugs.icu-project.org/trac/ticket/11104
 
   - patches/data.build.patch :
       Remove unnecessary resources : unames, collator rule source
   - patches/data.build.win.patch :
       Windows-only data build patch.
 
 9. Pre-built data files are checked in with the following steps on Linux:
 
     a. Make a icu data build directory outside the Chromium source tree
        and cd to that directory.
@@ skipping 52 matching lines @@
 10. Apply the following patches for regex
    - patches/regex.patch (a combined patch of 3 revisions below)
    - upstream bugs (fixed in the upstream ToT) :
      http://bugs.icu-project.org/trac/ticket/11370 (r36723:36724)
      http://bugs.icu-project.org/trac/ticket/11369 (r36726:36727)
      http://bugs.icu-project.org/trac/ticket/11371 (r36800:36801)
 
 11. Fix a bug in locid (getBaseName is wrong).
    - patches/locid.patch
    - upstream bug: http://bugs.icu-project.org/trac/ticket/11421