Add FilePath to base namespace.

base/i18n/file_util_icu.h

Index: base/i18n/file_util_icu.h
diff --git a/base/i18n/file_util_icu.h b/base/i18n/file_util_icu.h
index 4672135acb6e627c92ec9a5cc84efeb06ff4a864..cf22e7c05e13c4b7fd1d9a894af0196eb2772682 100644
--- a/base/i18n/file_util_icu.h
+++ b/base/i18n/file_util_icu.h
@@ -25,18 +25,18 @@ BASE_I18N_EXPORT bool IsFilenameLegal(const string16& file_name);
 //   file_name == "bad:file*name?.txt", changed to: "bad-file-name-.txt" when
 //   'replace_char' is '-'.
 BASE_I18N_EXPORT void ReplaceIllegalCharactersInPath(
-    FilePath::StringType* file_name,
+    base::FilePath::StringType* file_name,
     char replace_char);
 
 // Compares two filenames using the current locale information. This can be
 // used to sort directory listings. It behaves like "operator<" for use in
 // std::sort.
-BASE_I18N_EXPORT bool LocaleAwareCompareFilenames(const FilePath& a,
-                                                  const FilePath& b);
+BASE_I18N_EXPORT bool LocaleAwareCompareFilenames(const base::FilePath& a,
+                                                  const base::FilePath& b);
 
 // Calculates the canonical file-system representation of |file_name| base name.
 // Modifies |file_name| in place. No-op if not on ChromeOS.
-BASE_I18N_EXPORT void NormalizeFileNameEncoding(FilePath* file_name);
+BASE_I18N_EXPORT void NormalizeFileNameEncoding(base::FilePath* file_name);
 
 }  // namespace file_util