Remove CPWL_Utils::{In,De}flateRect

This CL removes the custom InflateRect and Deflate rect code in CPWL_Utils in
favour of calling the CFX_FloatRect version. This required inlining some extra
code at each callsite to check the rect size and normalize.

Change-Id: I7f60e5de03fc1db0c1d8e51eaa1d0e0700ebf157
Reviewed-on: https://pdfium-review.googlesource.com/7710
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
diff --git a/fpdfsdk/formfiller/cffl_formfiller.cpp b/fpdfsdk/formfiller/cffl_formfiller.cpp
index 31f6963..6d71be5 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_formfiller.cpp
@@ -73,7 +73,11 @@
   if (!rcFocus.IsEmpty())
     rcWin.Union(rcFocus);
 
-  return CPWL_Utils::InflateRect(rcWin, 1).GetOuterRect();
+  if (!rcWin.IsEmpty()) {
+    rcWin.Inflate(1, 1);
+    rcWin.Normalize();
+  }
+  return rcWin.GetOuterRect();
 }
 
 void CFFL_FormFiller::OnDraw(CPDFSDK_PageView* pPageView,