Fix all relative includes to third_party.

core/src/fpdftext/fpdf_text.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 "../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../include/fpdfapi/fpdf_page.h"
 #include "../../include/fpdfapi/fpdf_pageobj.h"
 #include "../../include/fpdfapi/fpdf_resource.h"
 #include "../../include/fpdftext/fpdf_text.h"
 #include "../../include/fxcrt/fx_bidi.h"
 #include "../../include/fxcrt/fx_ucd.h"
 #include "text_int.h"
+#include "third_party/base/nonstd_unique_ptr.h"
 #include "txtproc.h"
 
 CFX_ByteString CharFromUnicodeAlt(FX_WCHAR unicode,
                                   int destcp,
                                   const FX_CHAR* defchar) {
   if (destcp == 0) {
     if (unicode < 0x80) {
       return CFX_ByteString((char)unicode);
     }
     const FX_CHAR* altstr = FCS_GetAltStr(unicode);
@@ skipping 758 matching lines @@
                                FX_DWORD flags) {
   buffer.EstimateSize(0, 10240);
   CPDF_Page page;
   page.Load(pDoc, pPage);
   CPDF_ParseOptions options;
   options.m_bTextOnly = TRUE;
   options.m_bSeparateForm = FALSE;
   page.ParseContent(&options);
   GetTextStream_Unicode(buffer, &page, TRUE, NULL);
 }