Add FX_OVERRIDE and use it for virtual functions of FX_FINAL classes.

fpdfsdk/src/fpdfview.cpp

Index: fpdfsdk/src/fpdfview.cpp
diff --git a/fpdfsdk/src/fpdfview.cpp b/fpdfsdk/src/fpdfview.cpp
index 23d44935b544743727e3f6dd80f2d7c4c391d791..9f80ea1a71bfbfa09dddd4be278e3a56dac40e0f 100644
--- a/fpdfsdk/src/fpdfview.cpp
+++ b/fpdfsdk/src/fpdfview.cpp
@@ -13,34 +13,8 @@
 
 CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
 {
-	m_FileAccess = *pFileAccess;
-	m_BufferOffset = (FX_DWORD)-1;
-}
-
-FX_BOOL CPDF_CustomAccess::GetByte(FX_DWORD pos, FX_BYTE& ch)
-{
-	if (pos >= m_FileAccess.m_FileLen) return FALSE;
-	if (m_BufferOffset == (FX_DWORD)-1 || pos < m_BufferOffset || pos >= m_BufferOffset + 512) {
-		// Need to read from file access
-		m_BufferOffset = pos;
-		int size = 512;
-		if (pos + 512 > m_FileAccess.m_FileLen)
-			size = m_FileAccess.m_FileLen - pos;
-		if (!m_FileAccess.m_GetBlock(m_FileAccess.m_Param, m_BufferOffset, m_Buffer, size))
-			return FALSE;
-	}
-	ch = m_Buffer[pos - m_BufferOffset];
-	return TRUE;
-}
-
-FX_BOOL CPDF_CustomAccess::GetBlock(FX_DWORD pos, FX_LPBYTE pBuf, FX_DWORD size)
-{
-    FX_SAFE_DWORD newPos = size;
-    newPos += pos;
-    if (!newPos.IsValid() || newPos.ValueOrDie() > m_FileAccess.m_FileLen) {
-        return FALSE;
-    }
-    return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, pos, pBuf, size);
+	if (pFileAccess)
+		m_FileAccess = *pFileAccess;
 }
 
 FX_BOOL CPDF_CustomAccess::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)