Convert to google-style_ member names in fxbarcode/

-- Includes sub-directories.
-- Includes manual corrections (PS2 vs PS1).

Bug: 42271580
Change-Id: Ib859dfd8b5e833ebc29dca5e02828fb6586a91ed
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/130310
Auto-Submit: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Thomas Sepez <tsepez@google.com>
diff --git a/fxbarcode/BC_Writer.h b/fxbarcode/BC_Writer.h
index a951dbb..d5c5746 100644
--- a/fxbarcode/BC_Writer.h
+++ b/fxbarcode/BC_Writer.h
@@ -30,10 +30,10 @@
   static const FX_ARGB kBarColor = 0xff000000;
   static const FX_ARGB kBackgroundColor = 0xffffffff;
 
-  int32_t m_ModuleHeight = 1;
-  int32_t m_ModuleWidth = 1;
-  int32_t m_Height = 320;
-  int32_t m_Width = 640;
+  int32_t module_height_ = 1;
+  int32_t module_width_ = 1;
+  int32_t height_ = 320;
+  int32_t width_ = 640;
 };
 
 #endif  // FXBARCODE_BC_WRITER_H_