Deleted OS_WIN and all Windows specific files from base.

base/files/file_path.h

Index: base/files/file_path.h
diff --git a/base/files/file_path.h b/base/files/file_path.h
index 0c84af6c8551d16a03f63386777b436eb12ec596..6821e7fcad26313c2e3bb0df919c7d8865f86eea 100644
--- a/base/files/file_path.h
+++ b/base/files/file_path.h
@@ -119,10 +119,6 @@
 // enabled and disabled independently, to aid testing.  These #defines are
 // here so that the same setting can be used in both the implementation and
 // in the unit test.
-#if defined(OS_WIN)
-#define FILE_PATH_USES_DRIVE_LETTERS
-#define FILE_PATH_USES_WIN_SEPARATORS
-#endif  // OS_WIN
 
 namespace base {
 
@@ -138,11 +134,7 @@ class BASE_EXPORT FilePath {
   // may or may not be specified.  On Mac OS X, native pathnames are encoded
   // in UTF-8.
   typedef std::string StringType;
-#elif defined(OS_WIN)
-  // On Windows, for Unicode-aware applications, native pathnames are wchar_t
-  // arrays encoded in UTF-16.
-  typedef std::wstring StringType;
-#endif  // OS_WIN
+#endif  // OS_POSIX
 
   typedef StringType::value_type CharType;
 
@@ -448,10 +440,7 @@ void PrintTo(const FilePath& path, std::ostream* out);
 #if defined(OS_POSIX)
 #define FILE_PATH_LITERAL(x) x
 #define PRFilePath "s"
-#elif defined(OS_WIN)
-#define FILE_PATH_LITERAL(x) L ## x
-#define PRFilePath "ls"
-#endif  // OS_WIN
+#endif  // OS_POSIX
 
 // Provide a hash function so that hash_sets and maps can contain FilePath
 // objects.