Make code compile with clang_use_chrome_plugin (part VI)

This change mainly contains files in xfa/fwl directory.
This is part of the efforts to make PDFium code compilable
by Clang chromium style plugins.

The changes are mainly the following:
-- move inline constructor/destructor of complex class/struct out-of-line;
-- add constructor/destructor of complex class/struct if not
 explicitly defined;
-- add explicit out-of-line copy constructor when needed;
-- move inline virtual functions out-of-line;
-- Properly mark virtual functions with 'override';
-- some minor cleanups;

BUG=pdfium:469

Review-Url: https://codereview.chromium.org/2070583003

1 files changed, 3 insertions, 6 deletions

diff --git a/xfa/fwl/basewidget/fwl_monthcalendarimp.h b/xfa/fwl/basewidget/fwl_monthcalendarimp.h
index e44a17a1d3..a3a8f45aa0 100644
--- a/xfa/fwl/basewidget/fwl_monthcalendarimp.h
+++ b/xfa/fwl/basewidget/fwl_monthcalendarimp.h
@@ -216,12 +216,9 @@ struct FWL_DATEINFO {
                int32_t dayofweek,
                uint32_t dwSt,
                CFX_RectF rc,
-               CFX_WideString& wsday)
-      : iDay(day),
-        iDayOfWeek(dayofweek),
-        dwStates(dwSt),
-        rect(rc),
-        wsDay(wsday) {}
+               CFX_WideString& wsday);
+  ~FWL_DATEINFO();
+
   int32_t iDay;
   int32_t iDayOfWeek;
   uint32_t dwStates;