Cleanup: Fix base header include guards.

The header include guards should match the file path from root.

These entries were found using a modified version of Eric's
fix-include-guards.py script found attached in
https://code.google.com/p/chromium/issues/detail?id=435361#c7.

BUG=435361
TEST=base_unittests
R=danakj@chromium.org

Review URL: https://codereview.chromium.org/1137323003

Cr-Commit-Position: refs/heads/master@{#329731}


CrOS-Libchrome-Original-Commit: a311635161697b6fa55af300614beda7339f6bbd
diff --git a/base/files/dir_reader_linux.h b/base/files/dir_reader_linux.h
index cb0cbd3..abf2595 100644
--- a/base/files/dir_reader_linux.h
+++ b/base/files/dir_reader_linux.h
@@ -95,4 +95,4 @@
 
 }  // namespace base
 
-#endif // BASE_FILES_DIR_READER_LINUX_H_
+#endif  // BASE_FILES_DIR_READER_LINUX_H_