Rename IFWL classes which do not have CFWL equivalents

xfa/fwl/core/cfwl_datetimeedit.h

Index: xfa/fwl/core/cfwl_datetimeedit.h
diff --git a/xfa/fwl/core/ifwl_datetimeedit.h b/xfa/fwl/core/cfwl_datetimeedit.h
similarity index 76%
rename from xfa/fwl/core/ifwl_datetimeedit.h
rename to xfa/fwl/core/cfwl_datetimeedit.h
index 1d420b5dcd6576e36645432a5956530c458b541f..68efd2e13abd927918ac0bf757f297b09ac15c8a 100644
--- a/xfa/fwl/core/ifwl_datetimeedit.h
+++ b/xfa/fwl/core/cfwl_datetimeedit.h
@@ -4,8 +4,8 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef XFA_FWL_CORE_IFWL_DATETIMEEDIT_H_
-#define XFA_FWL_CORE_IFWL_DATETIMEEDIT_H_
+#ifndef XFA_FWL_CORE_CFWL_DATETIMEEDIT_H_
+#define XFA_FWL_CORE_CFWL_DATETIMEEDIT_H_
 
 #include <memory>
 
@@ -14,9 +14,9 @@
 #include "xfa/fwl/core/ifwl_edit.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-class IFWL_DateTimeEdit : public IFWL_Edit {
+class CFWL_DateTimeEdit : public IFWL_Edit {
  public:
-  IFWL_DateTimeEdit(const CFWL_App* app,
+  CFWL_DateTimeEdit(const CFWL_App* app,
                     std::unique_ptr<CFWL_WidgetProperties> properties,
                     IFWL_Widget* pOuter);
 
@@ -27,4 +27,4 @@ class IFWL_DateTimeEdit : public IFWL_Edit {
   void DisForm_OnProcessMessage(CFWL_Message* pMessage);
 };
 
-#endif  // XFA_FWL_CORE_IFWL_DATETIMEEDIT_H_
+#endif  // XFA_FWL_CORE_CFWL_DATETIMEEDIT_H_