Make code compile with clang_use_chrome_plugin (part IV)

This change mainly contains files in fpdfsdk/ 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 plus removing an unused file and splitting
cxfa_eventparam out from fxfa.h

BUG=pdfium:469

Review-Url: https://codereview.chromium.org/2062313002

1 files changed, 4 insertions, 4 deletions

diff --git a/fpdfsdk/include/fsdk_define.h b/fpdfsdk/include/fsdk_define.h
index 4a470206d3..89c3e739a7 100644
--- a/fpdfsdk/include/fsdk_define.h
+++ b/fpdfsdk/include/fsdk_define.h
@@ -40,12 +40,12 @@ class CPDF_CustomAccess final : public IFX_FileRead {
   ~CPDF_CustomAccess() override {}
 
   // IFX_FileRead
-  FX_FILESIZE GetSize() override { return m_FileAccess.m_FileLen; }
-  void Release() override { delete this; }
+  FX_FILESIZE GetSize() override;
+  void Release() override;
   FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
 
 #ifdef PDF_ENABLE_XFA
-  virtual CFX_ByteString GetFullPath() { return ""; }
+  virtual CFX_ByteString GetFullPath();
   virtual FX_BOOL GetByte(uint32_t pos, uint8_t& ch);
   virtual FX_BOOL GetBlock(uint32_t pos, uint8_t* pBuf, uint32_t size);
 #endif  // PDF_ENABLE_XFA
@@ -69,7 +69,7 @@ class CFPDF_FileStream : public IFX_FileStream {
   void Release() override;
   FX_FILESIZE GetSize() override;
   FX_BOOL IsEOF() override;
-  FX_FILESIZE GetPosition() override { return m_nCurPos; }
+  FX_FILESIZE GetPosition() override;
   FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
   size_t ReadBlock(void* buffer, size_t size) override;
   FX_BOOL WriteBlock(const void* buffer,