Remove IPDF_TextPage, IPDF_TextPageFind and IPDF_LinkExtract interfaces.

core/fpdftext/unicodenormalization.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/fpdftext/unicodenormalization.h"
-
-#include "core/fpdftext/unicodenormalizationdata.h"
-#include "core/fxcrt/include/fx_string.h"
-
-namespace {
-
-const uint16_t* const g_UnicodeData_Normalization_Maps[5] = {
-    nullptr, g_UnicodeData_Normalization_Map1, g_UnicodeData_Normalization_Map2,
-    g_UnicodeData_Normalization_Map3, g_UnicodeData_Normalization_Map4};
-
-}  // namespace
-
-FX_STRSIZE FX_Unicode_GetNormalization(FX_WCHAR wch, FX_WCHAR* pDst) {
-  wch = wch & 0xFFFF;
-  FX_WCHAR wFind = g_UnicodeData_Normalization[wch];
-  if (!wFind) {
-    if (pDst) {
-      *pDst = wch;
-    }
-    return 1;
-  }
-  if (wFind >= 0x8000) {
-    wch = wFind - 0x8000;
-    wFind = 1;
-  } else {
-    wch = wFind & 0x0FFF;
-    wFind >>= 12;
-  }
-  const uint16_t* pMap = g_UnicodeData_Normalization_Maps[wFind];
-  if (pMap == g_UnicodeData_Normalization_Map4) {
-    pMap = g_UnicodeData_Normalization_Map4 + wch;
-    wFind = (FX_WCHAR)(*pMap++);
-  } else {
-    pMap += wch;
-  }
-  if (pDst) {
-    FX_WCHAR n = wFind;
-    while (n--) {
-      *pDst++ = *pMap++;
-    }
-  }
-  return (FX_STRSIZE)wFind;
-}