Remove FX_BOOL from fpdfsdk.

Review-Url: https://codereview.chromium.org/2453683011
diff --git a/fpdfsdk/cpdfsdk_xfawidget.cpp b/fpdfsdk/cpdfsdk_xfawidget.cpp
index de4bd23..67a8a17 100644
--- a/fpdfsdk/cpdfsdk_xfawidget.cpp
+++ b/fpdfsdk/cpdfsdk_xfawidget.cpp
@@ -16,8 +16,8 @@
       m_pInterForm(pInterForm),
       m_hXFAWidget(pAnnot) {}
 
-FX_BOOL CPDFSDK_XFAWidget::IsXFAField() {
-  return TRUE;
+bool CPDFSDK_XFAWidget::IsXFAField() {
+  return true;
 }
 
 CXFA_FFWidget* CPDFSDK_XFAWidget::GetXFAWidget() const {