Make CPDF_TextStateData private to CPDF_TextState.

BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build_overrides/v8.gni")
 import("//testing/test.gni")
 import("pdfium.gni")
 
 config("pdfium_common_config") {
   cflags = []
@@ skipping 424 matching lines @@
     "core/fpdfapi/fpdf_page/cpdf_pageobjectlist.h",
     "core/fpdfapi/fpdf_page/cpdf_path.cpp",
     "core/fpdfapi/fpdf_page/cpdf_pathobject.cpp",
     "core/fpdfapi/fpdf_page/cpdf_pattern.cpp",
     "core/fpdfapi/fpdf_page/cpdf_pattern.h",
     "core/fpdfapi/fpdf_page/cpdf_shadingobject.cpp",
     "core/fpdfapi/fpdf_page/cpdf_shadingpattern.cpp",
     "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h",
     "core/fpdfapi/fpdf_page/cpdf_textobject.cpp",
     "core/fpdfapi/fpdf_page/cpdf_textstate.cpp",
-    "core/fpdfapi/fpdf_page/cpdf_textstate.h",
-    "core/fpdfapi/fpdf_page/cpdf_textstatedata.cpp",
     "core/fpdfapi/fpdf_page/cpdf_tilingpattern.cpp",
     "core/fpdfapi/fpdf_page/cpdf_tilingpattern.h",
     "core/fpdfapi/fpdf_page/fpdf_page_colors.cpp",
     "core/fpdfapi/fpdf_page/fpdf_page_doc.cpp",
     "core/fpdfapi/fpdf_page/fpdf_page_func.cpp",
     "core/fpdfapi/fpdf_page/fpdf_page_parser.cpp",
     "core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp",
     "core/fpdfapi/fpdf_page/include/cpdf_clippath.h",
     "core/fpdfapi/fpdf_page/include/cpdf_color.h",
     "core/fpdfapi/fpdf_page/include/cpdf_colorspace.h",
     "core/fpdfapi/fpdf_page/include/cpdf_form.h",
     "core/fpdfapi/fpdf_page/include/cpdf_formobject.h",
     "core/fpdfapi/fpdf_page/include/cpdf_generalstate.h",
     "core/fpdfapi/fpdf_page/include/cpdf_image.h",
     "core/fpdfapi/fpdf_page/include/cpdf_imageobject.h",
     "core/fpdfapi/fpdf_page/include/cpdf_page.h",
     "core/fpdfapi/fpdf_page/include/cpdf_pageobject.h",
     "core/fpdfapi/fpdf_page/include/cpdf_pageobjectholder.h",
     "core/fpdfapi/fpdf_page/include/cpdf_path.h",
     "core/fpdfapi/fpdf_page/include/cpdf_pathobject.h",
     "core/fpdfapi/fpdf_page/include/cpdf_shadingobject.h",
     "core/fpdfapi/fpdf_page/include/cpdf_textobject.h",
-    "core/fpdfapi/fpdf_page/include/cpdf_textstatedata.h",
+    "core/fpdfapi/fpdf_page/include/cpdf_textstate.h",
     "core/fpdfapi/fpdf_page/pageint.h",
     "core/fpdfapi/fpdf_parser/cfdf_document.cpp",
     "core/fpdfapi/fpdf_parser/cpdf_array.cpp",
     "core/fpdfapi/fpdf_parser/cpdf_boolean.cpp",
     "core/fpdfapi/fpdf_parser/cpdf_boolean.h",
     "core/fpdfapi/fpdf_parser/cpdf_crypto_handler.cpp",
     "core/fpdfapi/fpdf_parser/cpdf_crypto_handler.h",
     "core/fpdfapi/fpdf_parser/cpdf_data_avail.cpp",
     "core/fpdfapi/fpdf_parser/cpdf_dictionary.cpp",
     "core/fpdfapi/fpdf_parser/cpdf_document.cpp",
@@ skipping 1229 matching lines @@
 }
 
 if (pdf_is_standalone) {
   source_set("samples") {
     testonly = true
     deps = [
       "//samples",
     ]
   }
 }