Rename all m_rtFoo to m_FooRect.

Removing the Hungarian prefix would lose all semblence of being a
rectangle, and leads to collisons as it turns out.

Change-Id: I138c80618860a6fc400585c6da6c30f33921f296
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69650
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/xfa/fwl/cfwl_picturebox.cpp b/xfa/fwl/cfwl_picturebox.cpp
index 6e90765..287195c 100644
--- a/xfa/fwl/cfwl_picturebox.cpp
+++ b/xfa/fwl/cfwl_picturebox.cpp
@@ -26,7 +26,7 @@
   if (!m_pProperties->m_pThemeProvider)
     m_pProperties->m_pThemeProvider = GetAvailableTheme();
 
-  m_rtClient = GetClientRect();
+  m_ClientRect = GetClientRect();
 }
 
 void CFWL_PictureBox::DrawWidget(CXFA_Graphics* pGraphics,