Make code compile with clang_use_chrome_plugin (part V)chromium/2770

This change mainly contains files in xfa/fxfa 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/2071683002

1 files changed, 2 insertions, 0 deletions

diff --git a/xfa/fxfa/parser/xfa_document.h b/xfa/fxfa/parser/xfa_document.h
index 2890a6677c..39068c7076 100644
--- a/xfa/fxfa/parser/xfa_document.h
+++ b/xfa/fxfa/parser/xfa_document.h
@@ -57,10 +57,12 @@ class CScript_HostPseudoModel;
 class CScript_LogPseudoModel;
 class CScript_LayoutPseudoModel;
 class CScript_SignaturePseudoModel;
+
 class CXFA_Document {
  public:
   CXFA_Document(CXFA_DocumentParser* pParser);
   ~CXFA_Document();
+
   CXFA_Node* GetRoot() const { return m_pRootNode; }
   CXFA_DocumentParser* GetParser() const { return m_pParser; }
   CXFA_FFNotify* GetNotify() const;