Copy the relevant parts of ICU to a new file base/third_party/icu/icu_utf.*
so we can do basic UTF8/16/32 conversions without linking all of ICU.

Change callers who used to call SysUTF8ToWide/SysWideToUTF8 in base to using
these new functions. I will remove the Sys versions of these functions in a
later patch.

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/243102

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28219 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 047a03f4cefa75a67070f08b3f6b727f7ea702d5
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index 57190c5..5b606c9 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -20,8 +20,8 @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/platform_thread.h"
-#include "base/string_util.h"
 #include "base/time.h"
+#include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"