Switch one FXSYS_wcstof() caller to StringToFloat()

Since FXSYS_wcstof() and StringToFloat() are basically the same, switch
the FXSYS_wcstof() caller that does not care about the amount of string
parsed to use StringToFloat().

Change-Id: I18fdccef5bb49dc402979705b0ae6f8568d86fbf
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/128451
Reviewed-by: Thomas Sepez <tsepez@google.com>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

fxjs/xfa/cjx_object.cpp

diff --git a/fxjs/xfa/cjx_object.cpp b/fxjs/xfa/cjx_object.cpp
index 4b672a3..bf11ad8 100644
--- a/fxjs/xfa/cjx_object.cpp
+++ b/fxjs/xfa/cjx_object.cpp
@@ -239,8 +239,7 @@
       SetBoolean(eAttr, !wsValue.EqualsASCII("0"), bNotify);
       break;
     case XFA_AttributeType::Integer:
-      SetInteger(eAttr,
-                 FXSYS_roundf(FXSYS_wcstof(wsValue.AsStringView(), nullptr)),
+      SetInteger(eAttr, FXSYS_roundf(StringToFloat(wsValue.AsStringView())),
                  bNotify);
       break;
     case XFA_AttributeType::Measure: