Deleted OS_WIN and all Windows specific files from base.

base/i18n/file_util_icu.cc

Index: base/i18n/file_util_icu.cc
diff --git a/base/i18n/file_util_icu.cc b/base/i18n/file_util_icu.cc
index f6e2c2956f4f189073e75a5c29125bf70c218c05..1b056b26672f33608b9890b3179f72f4f2f74c47 100644
--- a/base/i18n/file_util_icu.cc
+++ b/base/i18n/file_util_icu.cc
@@ -115,10 +115,6 @@ void ReplaceIllegalCharactersInPath(FilePath::StringType* file_name,
     // Mac uses UTF-8 encoding for filenames.
     U8_NEXT(file_name->data(), cursor, static_cast<int>(file_name->length()),
             code_point);
-#elif defined(OS_WIN)
-    // Windows uses UTF-16 encoding for filenames.
-    U16_NEXT(file_name->data(), cursor, static_cast<int>(file_name->length()),
-             code_point);
 #elif defined(OS_POSIX)
     // Linux doesn't actually define an encoding. It basically allows anything
     // except for a few special ASCII characters.
@@ -151,11 +147,7 @@ bool LocaleAwareCompareFilenames(const FilePath& a, const FilePath& b) {
   // Make it case-sensitive.
   collator->setStrength(icu::Collator::TERTIARY);
 
-#if defined(OS_WIN)
-  return CompareString16WithCollator(*collator, WideToUTF16(a.value()),
-                                     WideToUTF16(b.value())) == UCOL_LESS;
-
-#elif defined(OS_POSIX)
+#if defined(OS_POSIX)
   // On linux, the file system encoding is not defined. We assume
   // SysNativeMBToWide takes care of it.
   return CompareString16WithCollator(