Make all the single byte encodings compliant to the encoding spec.

README.chromium

 Name: icu
 URL: http://site.icu-project.org/
 Version: 52.1
 License: MIT
 Security Critical: yes
 
 Description:
 This directory contains the source code of ICU 52.1 for C/C++
 
 1. It was obtained with the following:
@@ skipping 56 matching lines @@
      patch: patches/cjdict.patch
      upstream bug: http://bugs.icu-project.org/trac/ticket/10888
 
 
    - android/brkitr.patch (to be applied for Android build only) :
        Reverts some changes about Chinese/Japanese segmentation rules in
        patches/brkitr.patch to reduce binary size for Android.
 
 4. Converter changes :
 
-  - converters.patch :
-     a. revises existing mapping tables
-     b. Remove a lot of unused aliases in the converter alias table
-        (source/data/mappings/convrtrs.txt ) leading to 40kB size reduction.
+  - convrtrs.txt : Replaced the original by our own that only lists encodings
+    and aliases required by the WHATWG Encoding spec plus a few extra (see
+    the file as to why).
 
   - Add source/data/mappings/ucmlocal.txt : to list only converters we need.
-  - Add three new tables per WHATWG encoding standards for EUC-JP,
-    Shift_JIS and CP866.
-    They're generated with scripts/{eucjp, sjis, ibm866}_gen.sh.
+
+  - Add new tables per the WHATWG encoding standards for EUC-JP,
+    Shift_JIS and all the single byte encodings.
+    They're generated with scripts : scripts/{eucjp, sjis, single_byte}_gen.sh
 
   - uconv.patch
     a. ISO-2022-JP-[1-4] is dropped.
     b. SCSU, BOCU, ISCII, UTF-7, LMB, ibm42*, ISO-2022-{KR,CN*} and HZ-GB  :
        converters and detectors are dropped leading to the ~100kB reduction
        in the code size.
 
 
 5. Locale changes
   - patches/locale1.patch :
@@ skipping 132 matching lines @@
       f. Copy that icudt52.dll to ${CHROME_ICU_ROOT}/windows/icudt.dll
          and check that in.
 
 
 10. Change export of U_ICUDATA_ENTRY_POINT from U_IMPORT to U_EXPORT.
     - patches/declspec.patch
 
 11. Cherry-pick an upstream patch to fix a bug in bidi.
     - patches/bidi.patch
     - upstream bug : http://bugs.icu-project.org/trac/ticket/11054