Adds Hans-Hant transliterators and drops el-Upper from ICU data

README.chromium

 Name: icu
 URL: http://site.icu-project.org/
 Version: 58.1
 License: MIT
 Security Critical: yes
 
 Description:
 This directory contains the source code of ICU 58.1 for C/C++.
 
 A. How to update ICU
@@ skipping 21 matching lines @@
 
   a. Make a icu data build directory outside the Chromium source tree
      and cd to that directory (say, $ICUBUILDIR).
 
   b. Run
 
     ${CHROME_ICU_TREE_TOP}/source/runConfigureICU Linux --disable-layout --disable-tests
 
 
   c. Run make
-     'make' will fail  when pkgdata looks for css3transform.res. This
+     'make' will fail  when pkgdata looks for root_subset.res. This
      is expected. See http://bugs.icu-project.org/trac/ticket/10570
 
   d. Run
        ${CHROME_ICU_TREE_TOP}/scripts/trim_data.sh
 
     The full locale data for Chrome's UI languages and their select variants
     and the bare minimum locale data for other locales will be kept.
 
   e. Run
        ${CHROME_ICU_TREE_TOP}/scripts/make_data.sh
@@ skipping 115 matching lines @@
    locale data
 
   - brklocal.mk drops all *loose.brk to save space ( ~370kB) for now.
 
 3. source/data/brkitr
   - khmerdict.txt: Abridged Khmer dictionary. See
     http://bugs.icu-project.org/trac/ticket/9451
   - word_ja.txt (used only on Android)
     Added for Japanese-specific word-breaking without the C+J dictionary.
 
-4. source/data/trnslit/css3transform.txt
-  - Handle Greek case conversion with a transliterator
+4. source/data/trnslit/root_subset.txt
+   Subset of transliteration data to keep for:
+   - Handling Chinese Simplified/Traditional text detection
 
 5. Add {an,ast,ckb,ku,tg,wa}.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)'.
 
 D. Local Modifications
 
 1. Applied locale data patches from Google obtained by diff'ing
    the upstream copy and Google's internal copy for source/data
@@ skipping 73 matching lines @@
    upstream bugs:
      http://www.icu-project.org/trac/ticket/12825 (scriptset)
      http://www.icu-project.org/trac/ticket/12815 (uspoof)
      http://www.icu-project.org/trac/ticket/12822 (without std::string on Win)
      http://www.icu-project.org/trac/ticket/12832 (greek_upper)
 
    - patches/scriptset.patch
    - patches/uspoof.patch
    - patches/digilist.patch
    - patches/greek_upper.patch