Merge to XFA: Clear decoders after the image decoder in the /Filter array.

core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/include/fpdfapi/fpdf_parser.h"
 
 #include "core/include/fxcrt/fx_string.h"
 
@@ skipping 478 matching lines @@
   if (CPDF_Stream* pStream = p->AsStream())
     return pStream->GetDict();
   return NULL;
 }
 CPDF_Stream* CPDF_Array::GetStream(FX_DWORD i) const {
   return ToStream(GetElementValue(i));
 }
 CPDF_Array* CPDF_Array::GetArray(FX_DWORD i) const {
   return ToArray(GetElementValue(i));
 }
-void CPDF_Array::RemoveAt(FX_DWORD i) {
-  ASSERT(IsArray());
+void CPDF_Array::RemoveAt(FX_DWORD i, int nCount) {
   if (i >= (FX_DWORD)m_Objects.GetSize())
     return;
-  if (CPDF_Object* p = static_cast<CPDF_Object*>(m_Objects.GetAt(i)))
-    p->Release();
-  m_Objects.RemoveAt(i);
+
+  if (nCount <= 0 || nCount > m_Objects.GetSize() - i)
+    return;
+
+  for (int j = 0; j < nCount; ++j) {
+    if (CPDF_Object* p = static_cast<CPDF_Object*>(m_Objects.GetAt(i + j)))
+      p->Release();
+  }
+  m_Objects.RemoveAt(i, nCount);
 }
 void CPDF_Array::SetAt(FX_DWORD i,
                        CPDF_Object* pObj,
                        CPDF_IndirectObjects* pObjs) {
   ASSERT(IsArray());
   ASSERT(i < (FX_DWORD)m_Objects.GetSize());
   if (i >= (FX_DWORD)m_Objects.GetSize())
     return;
   if (CPDF_Object* pOld = static_cast<CPDF_Object*>(m_Objects.GetAt(i)))
     pOld->Release();
@@ skipping 653 matching lines @@
   }
   pObj->m_ObjNum = objnum;
   m_IndirectObjs.SetAt((void*)(uintptr_t)objnum, pObj);
   if (m_LastObjNum < objnum) {
     m_LastObjNum = objnum;
   }
 }
 FX_DWORD CPDF_IndirectObjects::GetLastObjNum() const {
   return m_LastObjNum;
 }