Make code compile with clang_use_chrome_plugin (part I)

This change contains files in core/fpdfapi 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/2060973002

1 files changed, 3 insertions, 0 deletions

diff --git a/core/fpdfapi/fpdf_edit/editint.h b/core/fpdfapi/fpdf_edit/editint.h
index a7774050ae..cd04d5de4f 100644
--- a/core/fpdfapi/fpdf_edit/editint.h
+++ b/core/fpdfapi/fpdf_edit/editint.h
@@ -24,6 +24,7 @@ class CPDF_ObjectStream {
   };
 
   CPDF_ObjectStream();
+  ~CPDF_ObjectStream();
 
   void Start();
   FX_FILESIZE End(CPDF_Creator* pCreator);
@@ -46,6 +47,7 @@ class CPDF_XRefStream {
   };
 
   CPDF_XRefStream();
+  ~CPDF_XRefStream();
 
   FX_BOOL Start();
   int32_t CompressIndirectObject(uint32_t dwObjNum,
@@ -66,6 +68,7 @@ class CPDF_XRefStream {
  protected:
   int32_t EndObjectStream(CPDF_Creator* pCreator, FX_BOOL bEOF = TRUE);
   FX_BOOL GenerateXRefStream(CPDF_Creator* pCreator, FX_BOOL bEOF);
+
   size_t m_iSeg;
   CPDF_ObjectStream m_ObjStream;
   CFX_ByteTextBuf m_Buffer;