Revert postscript code removal.

core/fxge/win32/cpsoutput.cpp

+// Copyright 2016 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/fxge/win32/cpsoutput.h"
+
+#include <algorithm>
+
+#include "core/fxcrt/fx_system.h"
+
+CPSOutput::CPSOutput(HDC hDC) {
+  m_hDC = hDC;
+}
+
+CPSOutput::~CPSOutput() {}
+
+void CPSOutput::Release() {
+  delete this;
+}
+
+void CPSOutput::OutputPS(const FX_CHAR* str, int len) {
+  if (len < 0)
+    len = static_cast<int>(FXSYS_strlen(str));
+
+  int sent_len = 0;
+  while (len > 0) {
+    FX_CHAR buffer[1026];
+    int send_len = std::min(len, 1024);
+    *(reinterpret_cast<uint16_t*>(buffer)) = send_len;
+    FXSYS_memcpy(buffer + 2, str + sent_len, send_len);
+
+    // TODO(thestig/rbpotter): Do PASSTHROUGH for non-Chromium usage.
+    // ExtEscape(m_hDC, PASSTHROUGH, send_len + 2, buffer, 0, nullptr);
+    ::GdiComment(m_hDC, send_len + 2, reinterpret_cast<const BYTE*>(buffer));
+    sent_len += send_len;
+    len -= send_len;
+  }
+}