Update references to ICU 5.2 in README.chromium to 5.4

README.chromium

 Name: icu
 URL: http://site.icu-project.org/
 Version: 54.1
 License: MIT
 Security Critical: yes
 
 Description:
 This directory contains the source code of ICU 54.1 for C/C++.
 
 
@@ skipping 176 matching lines @@
 
       ${CHROME_ICU_TREE_TOP}/source/runConfigureICU Linux --disable-layout
 
     c. Run 'make'
     d. 'make' will fail  when pkgdata looks for css3transform.res. Edit
       data/out/tmp/icudata.lst to replace 'css3transform.res' with 'root.res'.
     (see http://bugs.icu-project.org/trac/ticket/10570 ) and run 'make' again.
 
 
     - source/data/in/icudtl.dat : Built on Linux with all the patches
-      above applied. icudt52l.dat is generated in
+      above applied. icudt54l.dat is generated in
       {BUILD_DIR_ROOT}/data/out/tmp and copied to the above location with a
-      version number (52) dropped.
+      version number (54) dropped.
 
 
     - {mac,linux}/icudtl_dat.S : Built on Linux with all the
       patches above (except android/brkitr.patch) applied and checked in.
       This file will be generated in {BUILD_DIR_ROOT}/data/out/tmp as
-      icudt52l_dat.S, but '52' is dropped while copying.
+      icudt54l_dat.S, but '54' is dropped while copying.
 
       mac/icudtl_dat.S is identical to linux/icudtl_dat.S except for
       the header portion. With "linux/icudtl_dat.S" in its place,
       run scripts/make_mac_assembly.sh to generate it.
 
     - android/icudtl_dat.S : Built on Linux with all the patches above and
       android/brkitr.patch applied and android/patch_locale.sh executed.
-      '52' is dropped from the name generated in the build tree.
+      '54' is dropped from the name generated in the build tree.
 
-    - android/icudtl.dat : Generated as icudt52l.dat in
-      {BUILD_DIR_ROOT}/data/out/tmp along with icudt52l_dat.S and
-      copied to the above location with '52' dropped in its name.
+    - android/icudtl.dat : Generated as icudt54l.dat in
+      {BUILD_DIR_ROOT}/data/out/tmp along with icudt54l_dat.S and
+      copied to the above location with '54' dropped in its name.
 
     - windows/icudt.dll (by default, we set icu_use_icu_data_flag to 1
       and don't use this file.)
 
-      a. check out a clean copy of icu52  from the upstream on Windows
+      a. check out a clean copy of icu54  from the upstream on Windows
          outside the Chrome tree.
 
-        $ svn export --native-eol LF http://source.icu-project.org/repos/icu/icu/tags/release-52-1 ${SEPARATE_ICU_ROOT}/icu52
+        $ svn export --native-eol LF http://source.icu-project.org/repos/icu/icu/tags/release-54-1 ${SEPARATE_ICU_ROOT}/icu54
 
       b. copy ${CHROME_ICU_ROOT}/source/data/in/icudtl.dat to
-         ${SEPARATE_ICU_ROOT}/source/data/in/icudt52l.dat
+         ${SEPARATE_ICU_ROOT}/source/data/in/icudt54l.dat
       c. copy ${CHROME_ICU_ROOT}/source/data/makedata.mak to
          ${SEPARATE_ICU_ROOT}/source/data/makedata.mak
       c. In Visual Studio, open source/allinone/allinone.sln solution
          in ${SEPARATE_ICU_ROOT}
       d. Build 'makedata' target
-      e. icudt52.dll will be generated in ${SEPARATE_ICU_ROOT}/bin
-      f. Copy that icudt52.dll to ${CHROME_ICU_ROOT}/windows/icudt.dll
+      e. icudt54.dll will be generated in ${SEPARATE_ICU_ROOT}/bin
+      f. Copy that icudt54.dll to ${CHROME_ICU_ROOT}/windows/icudt.dll
          and check that in.
 
 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
 
 12. Fix a bug in BiDi
    - patches/bidi.patch
    - upstream bug: http://bugs.icu-project.org/trac/ticket/11177