Make ICU build with Clang. ...

third_party/icu/README.chromium

 Name: ICU
 URL: http://site.icu-project.org/
 
 This directory contains the source code of ICU 4.6 for C/C++
 
 1. It was obtained with the following:
 
     $ svn export --native-eol LF http://source.icu-project.org/repos/icu/icu/tags/release-4-6 icu46
 
 2. The following directories were removed because they're not used by Chromium
@@ skipping 81 matching lines @@
   - patches/wpo.patch
   - patches/vscomp.patch
     (see http://bugs.icu-project.org/trac/ticket/8355 and
          http://bugs.icu-project.org/trac/ticket/8356 )
   - patches/rtti.patch : Make RTTI work without exception handling on Windows
     (see http://bugs.icu-project.org/trac/ticket/8343)
   - patches/data.build.patch :
       To remove some data files we don't use and cut down the data size.
   - patches/data.build.win.patch :
       Windows-only data build patch. Add a new target DATALIB to makedata.mak
+  - patches/clang.patch: To build with Clang.
   - add an empty file (stubdatabuilt.txt) to source/stubdata
 
 9. Pre-built data libraries are checked in.
 
     Before building data file on Linux, re-run runConfigureICU Linux again
     if it's run without data.build.patch in #8 above.
 
     'make' will fail in the 1st pass. Copy source/data/in/coll/invuca.icu
     to {BUILD_DIR_ROOT}/data/out/build/icudt46l/coll and re-run 'make'
     in {BUILD_DIR_ROOT}/data.
@@ skipping 10 matching lines @@
     - cros/icudt46l_dat.S : Built on Linux with
       abriged locale source files in cros/data put
       in source/data. Those abridged locales files are
       for locales ChromeOS is not localized to. 
 
 11. The header files were moved as shown below:
 
    source/common/unicode ==> public/common/unicode
    source/i18n/unicode   ==> public/i18n/unicode