Take buffers from the partition in CPDF_Creator

Change-Id: Ide3a994940f2580f740c7deea586a74cea1c57c3
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/62751
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

core/fpdfapi/edit/cpdf_creator.cpp

diff --git a/core/fpdfapi/edit/cpdf_creator.cpp b/core/fpdfapi/edit/cpdf_creator.cpp
index 00936a3..71ef379 100644
--- a/core/fpdfapi/edit/cpdf_creator.cpp
+++ b/core/fpdfapi/edit/cpdf_creator.cpp
@@ -21,6 +21,7 @@
 #include "core/fpdfapi/parser/cpdf_syntax_parser.h"
 #include "core/fpdfapi/parser/fpdf_parser_utility.h"
 #include "core/fxcrt/fx_extension.h"
+#include "core/fxcrt/fx_memory_wrappers.h"
 #include "core/fxcrt/fx_random.h"
 #include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
@@ -47,7 +48,7 @@
 
   FX_FILESIZE offset_;
   size_t current_length_;
-  std::vector<uint8_t> buffer_;
+  std::vector<uint8_t, FxAllocAllocator<uint8_t>> buffer_;
   RetainPtr<IFX_RetainableWriteStream> backing_file_;
 };
 
@@ -259,7 +260,7 @@
   if (m_iStage == Stage::kWriteIncremental15) {
     if (m_IsOriginal && m_SavedOffset > 0) {
       static constexpr FX_FILESIZE kBufferSize = 4096;
-      std::vector<uint8_t> buffer(kBufferSize);
+      std::vector<uint8_t, FxAllocAllocator<uint8_t>> buffer(kBufferSize);
       FX_FILESIZE src_size = m_SavedOffset;
       m_pParser->GetSyntax()->SetPos(0);
       while (src_size) {