Remove unused PS generation code.

core/fpdfapi/fpdf_edit/fpdf_edit_create.cpp

Index: core/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
diff --git a/core/fpdfapi/fpdf_edit/fpdf_edit_create.cpp b/core/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
index 0a833a4835ddf9ee8c78e7d840524798c49fb596..09833d82cca619629c11f21ce6dcbd5e3ddcfdc1 100644
--- a/core/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
+++ b/core/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
@@ -388,8 +388,8 @@ class CPDF_FlateEncoder {
   CPDF_FlateEncoder(CPDF_Stream* pStream, FX_BOOL bFlateEncode);
   CPDF_FlateEncoder(const uint8_t* pBuffer,
                     uint32_t size,
-                    FX_BOOL bFlateEncode,
-                    FX_BOOL bXRefStream = FALSE);
+                    bool bFlateEncode,
+                    bool bXRefStream);
   ~CPDF_FlateEncoder();
 
   void CloneDict();
@@ -439,7 +439,8 @@ CPDF_FlateEncoder::CPDF_FlateEncoder(CPDF_Stream* pStream, FX_BOOL bFlateEncode)
 
   m_bNewData = TRUE;
   m_bCloned = TRUE;
-  ::FlateEncode(m_Acc.GetData(), m_Acc.GetSize(), m_pData, m_dwSize);
+  // TODO(thestig): Move to Init() and check return value.
+  ::FlateEncode(m_Acc.GetData(), m_Acc.GetSize(), &m_pData, &m_dwSize);
   m_pDict = ToDictionary(pStream->GetDict()->Clone());
   m_pDict->SetAtInteger("Length", m_dwSize);
   m_pDict->SetAtName("Filter", "FlateDecode");
@@ -448,8 +449,8 @@ CPDF_FlateEncoder::CPDF_FlateEncoder(CPDF_Stream* pStream, FX_BOOL bFlateEncode)
 
 CPDF_FlateEncoder::CPDF_FlateEncoder(const uint8_t* pBuffer,
                                      uint32_t size,
-                                     FX_BOOL bFlateEncode,
-                                     FX_BOOL bXRefStream)
+                                     bool bFlateEncode,
+                                     bool bXRefStream)
     : m_pData(nullptr),
       m_dwSize(0),
       m_pDict(nullptr),
@@ -461,10 +462,11 @@ CPDF_FlateEncoder::CPDF_FlateEncoder(const uint8_t* pBuffer,
     return;
   }
   m_bNewData = TRUE;
+  // TODO(thestig): Move to Init() and check return value.
   if (bXRefStream)
-    ::FlateEncode(pBuffer, size, 12, 1, 8, 7, m_pData, m_dwSize);
+    ::PngEncode(pBuffer, size, &m_pData, &m_dwSize);
   else
-    ::FlateEncode(pBuffer, size, m_pData, m_dwSize);
+    ::FlateEncode(pBuffer, size, &m_pData, &m_dwSize);
 }
 
 CPDF_FlateEncoder::~CPDF_FlateEncoder() {
@@ -577,7 +579,7 @@ FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) {
 
   tempBuffer << m_Buffer;
   CPDF_FlateEncoder encoder(tempBuffer.GetBuffer(), tempBuffer.GetLength(),
-                            TRUE);
+                            true, false);
   CPDF_Encryptor encryptor(pCreator->m_pCryptoHandler, m_dwObjNum,
                            encoder.m_pData, encoder.m_dwSize);
   if ((len = pFile->AppendDWord(encryptor.m_dwSize)) < 0) {
@@ -785,26 +787,24 @@ FX_BOOL CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator,
     }
     offset += offset_len + 6;
   }
-  FX_BOOL bPredictor = TRUE;
   CPDF_FlateEncoder encoder(m_Buffer.GetBuffer(), m_Buffer.GetLength(), TRUE,
-                            bPredictor);
-  if (pFile->AppendString("/Filter /FlateDecode") < 0) {
+                            TRUE);
+  if (pFile->AppendString("/Filter /FlateDecode") < 0)
     return FALSE;
-  }
+
   offset += 20;
-  if (bPredictor) {
-    if ((len = pFile->AppendString("/DecodeParms<</Columns 7/Predictor 12>>")) <
-        0) {
-      return FALSE;
-    }
-    offset += len;
-  }
-  if (pFile->AppendString("/Length ") < 0) {
+  if ((len = pFile->AppendString("/DecodeParms<</Columns 7/Predictor 12>>")) <
+      0) {
     return FALSE;
   }
-  if ((len = pFile->AppendDWord(encoder.m_dwSize)) < 0) {
+
+  offset += len;
+  if (pFile->AppendString("/Length ") < 0)
     return FALSE;
-  }
+
+  if ((len = pFile->AppendDWord(encoder.m_dwSize)) < 0)
+    return FALSE;
+
   offset += len + 8;
   if (bEOF) {
     if ((len = PDF_CreatorWriteTrailer(pCreator->m_pDocument, pFile,
@@ -899,7 +899,7 @@ CPDF_Creator::~CPDF_Creator() {
   ResetStandardSecurity();
   if (m_bEncryptCloned && m_pEncryptDict) {
     m_pEncryptDict->Release();
-    m_pEncryptDict = NULL;
+    m_pEncryptDict = nullptr;
   }
   Clear();
 }
@@ -1441,7 +1441,7 @@ int32_t CPDF_Creator::WriteDoc_Stage1(IFX_Pause* pPause) {
       m_dwFlags &= ~FPDFCREATE_INCREMENTAL;
     }
     CPDF_Dictionary* pDict = m_pDocument->GetRoot();
-    m_pMetadata = pDict ? pDict->GetDirectObjectBy("Metadata") : NULL;
+    m_pMetadata = pDict ? pDict->GetDirectObjectBy("Metadata") : nullptr;
     if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) {
       m_pXRefStream.reset(new CPDF_XRefStream);
       m_pXRefStream->Start();
@@ -1556,7 +1556,7 @@ int32_t CPDF_Creator::WriteDoc_Stage2(IFX_Pause* pPause) {
     m_iStage = 27;
   }
   if (m_iStage == 27) {
-    if (NULL != m_pEncryptDict && 0 == m_pEncryptDict->GetObjNum()) {
+    if (m_pEncryptDict && !m_pEncryptDict->GetObjNum()) {
       m_dwLastObjNum += 1;
       FX_FILESIZE saveOffset = m_Offset;
       if (WriteIndirectObj(m_dwLastObjNum, m_pEncryptDict) < 0) {
@@ -1893,13 +1893,14 @@ int32_t CPDF_Creator::WriteDoc_Stage4(IFX_Pause* pPause) {
   m_File.Flush();
   return m_iStage = 100;
 }
+
 void CPDF_Creator::Clear() {
   m_pXRefStream.reset();
   m_File.Clear();
   m_NewObjNumArray.RemoveAll();
   if (m_pIDArray) {
     m_pIDArray->Release();
-    m_pIDArray = NULL;
+    m_pIDArray = nullptr;
   }
 }
 
@@ -1916,17 +1917,17 @@ bool CPDF_Creator::Create(uint32_t flags) {
   m_ObjectOffset.Clear();
   m_NewObjNumArray.RemoveAll();
   InitID();
-  if (flags & FPDFCREATE_PROGRESSIVE) {
+  if (flags & FPDFCREATE_PROGRESSIVE)
     return true;
-  }
-  return Continue(NULL) > -1;
+  return Continue(nullptr) > -1;
 }
+
 void CPDF_Creator::InitID(FX_BOOL bDefault) {
-  CPDF_Array* pOldIDArray = m_pParser ? m_pParser->GetIDArray() : NULL;
+  CPDF_Array* pOldIDArray = m_pParser ? m_pParser->GetIDArray() : nullptr;
   FX_BOOL bNewId = !m_pIDArray;
   if (!m_pIDArray) {
     m_pIDArray = new CPDF_Array;
-    CPDF_Object* pID1 = pOldIDArray ? pOldIDArray->GetObjectAt(0) : NULL;
+    CPDF_Object* pID1 = pOldIDArray ? pOldIDArray->GetObjectAt(0) : nullptr;
     if (pID1) {
       m_pIDArray->Add(pID1->Clone());
     } else {