* Highlights:
  - Emoji 5.0 data (partial; Emoji_Component property not included)
  - CLDR 31.0.1 (http://blog.unicode.org/2017/03/cldr-version-31-released.html)
    UTC and GMT are treated as distinct)
  - New case mapping API for styled text
  - C++ 11 is required
  - char16_t for UChar (UTF-16)
  - Source code is in UTF-8

* Size changes

  common: 10,130,560 => 10,175,056
  android: 6,573,872 => 6,616,864
  iOS: 6,562,352 => 6,605,152

On top of ICU 59.1 from the upstream, the following changes were applied.
See https://chromium.googlesource.com/chromium/deps/icu/+log/chromium/59staging

  - Fix C++ 11 string literal assignment issue (upstream bug: 13192)
  - Fix C4229 warning by MSVC
  - Apply utf32.patch and include unistr.h in fuzzer_util
  - Update ICU data files
  - Fix wpo.patch
  - Apply Google locale patch and locale1.patch
  - update readme
  - Apply breakiterator related patches
  - Apply and update wpo.patch
  - Drop unused patch, apply data.build.win.patch, update README.chromium
  - Add /utf-8 flag for Windows/Visual Studio
  - Update BUILD.gn for UChar, stubdata and apply data_sym.patch
  - use stubdata.cpp instead of stubdata.c in icu.gyp
  - Update icu.gyp* files for v8
  - Update BUILD.gn, apply data.build.patch and vscomp.patch
  - Add new files in ICU 59.1
  - Get a fresh copy of ICU 59.1 from the upstream
  - Update update.sh script

TBR=drott@chromium.org, yangguo@chromium.org
Bug:699469
TEST: layout tests, all unittests, browser tests
Change-Id: Ie1e77323aa0c7f872153680c4deca6471a771a5c
Reviewed-on: https://chromium-review.googlesource.com/505173


Reviewed-by: Jungshik Shin <jshin@chromium.org>

Follw-up to https://chromium.googlesource.com/chromium/deps/icu/+/5feb9ad5
(due to a rietveld issue, part 1 was manually pushed).

Update ICU to 58.1 release from ICU 56.1 part2.

Listed below a tiny subset of what's new in 58.1:

  1. Unicode 9.0 from Unicode 8.0
    - Updated character properties including Emoji data up to 4.0beta.
    - Updated grapheme/word/line breaking rules for Emoji sequences and others.

  2. CLDR 30.0.2 from CLDR 28
    - Numerous locale data updates/improvements

  3. Spoofing API changes
  4. Greek uppercasing support as a part of regular case-mapping API.
  5. Line breaking rule file format optimization. This change enables me
     to add CJ loose line breaking rules back (previously, it's dropped
     to save space) so that Blink can use it for CJ.

See http://site.icu-project.org/download/58 for more details on ICU 58.1
and http://site.icu-project.org/download/57 for more details on ICU 57.1

For CLDR 30, see http://cldr.unicode.org/index/downloads/cldr-30 .

The size impact:
   Non-Android: 10,127,200 => 10,128,624 (delta = 1,424 / 0.014%)
   Android: 6,563,152 => 6,571,936 (delta = 8,784 / 0.13%)

Below are the list of changes made on top of the upstream ICU 58.1
in reverse order. Most of these changes were made in 58staging branch
to run trybots and cherry-picked back for this CL. See
   https://chromium.googlesource.com/chromium/deps/icu/+/log/chromium/58staging
   https://codereview.chromium.org/2447513002/ : cr+blink update cl with
       58staging branch head.

* Fix a build on Win without std::string (v8)
* Add ms932 alias to Shift_JIS

* Apply Google-specific locale data patches

* Fix a bug in scriptset

* Update windows-1255 mapping

* Disable C4333 warning by MSVC (harmless)

* Apply and update utf32.patch and README.chromium

* Update and apply vscomp.patch
  stringpiece patch removed. VS2015 seems to be fine with a redefinition.

* Update pre-built ICU data files
   Update *local.mk with a new copyright line

* Apply more patches
  The following patches were applied and updated: data_symb, vscomp, wpo

  The unnecessary part was dropped from vscomp

* Update BUILD.gn and icu.gyp* files

* Update android/brkitr.patch

* Update and apply more patches

* Update and apply cjdict.patch
   Apply data.build.patch

* Delete obsolete patches: cmemory,regex

* Update README.chromium and apply brkitr patches

  - Update README.chromium
  - Remove obsolete patches
  - Update linebrk.patch and apply it: add back line_loose_cj

* Update wordbrk.patch and apply it

* Update and apply khmer-dictbe.patch

* Update data trimming

  - android/patch_locale.sh
  - scripts/trim_data.sh
     ExemplarCh* removed
     charac*Label removed
     relative/relativeTime removed for daysOfWeek and quarter

* Update the following patches

  android/brkitr.patch
  patches/linebrk.patch
  patches/data.build.patch

* Update cjdict.patch and linebrk.patch

BUG=637001
TEST=Layout tests, all unittests, browser tests, ui tests.
R=jsbell@chromium.org, mark@chromium.org

Review URL: https://codereview.chromium.org/2442923002 .

See http://crbug.com/417850 for UTF-32
See http://bugs.icu-project.org/trac/ticket/12147 for C4275 warning
from MSVC.

BUG=575007
TEST=Layout tests fast/encoding/*
TEST=MSVC does not emit C4275 warning any more
R=jsbell@chromium.org

Review URL: https://codereview.chromium.org/1664293002 .