Move CPDFSDK_Annot, CPDFSDK_BAAnnot and CPDFSDK_DateTime to their own files.

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 46 matching lines @@
   visibility = [ ":*" ]
   if (is_posix && !is_clang) {  # When GCC.
     cflags = [ "-Wno-strict-overflow" ]
   }
 }
 
 static_library("pdfium") {
   sources = [
     "fpdfsdk/cfx_systemhandler.cpp",
     "fpdfsdk/cfx_systemhandler.h",
+    "fpdfsdk/cpdfsdk_annot.cpp",
+    "fpdfsdk/cpdfsdk_baannot.cpp",
+    "fpdfsdk/cpdfsdk_datetime.cpp",
     "fpdfsdk/fpdf_dataavail.cpp",
     "fpdfsdk/fpdf_ext.cpp",
     "fpdfsdk/fpdf_flatten.cpp",
     "fpdfsdk/fpdf_progressive.cpp",
     "fpdfsdk/fpdf_searchex.cpp",
     "fpdfsdk/fpdf_sysfontinfo.cpp",
     "fpdfsdk/fpdf_transformpage.cpp",
     "fpdfsdk/fpdfdoc.cpp",
     "fpdfsdk/fpdfeditimg.cpp",
     "fpdfsdk/fpdfeditpage.cpp",
     "fpdfsdk/fpdfformfill.cpp",
     "fpdfsdk/fpdfppo.cpp",
     "fpdfsdk/fpdfsave.cpp",
     "fpdfsdk/fpdftext.cpp",
     "fpdfsdk/fpdfview.cpp",
     "fpdfsdk/fsdk_actionhandler.cpp",
     "fpdfsdk/fsdk_annothandler.cpp",
-    "fpdfsdk/fsdk_baseannot.cpp",
     "fpdfsdk/fsdk_baseform.cpp",
     "fpdfsdk/fsdk_mgr.cpp",
     "fpdfsdk/fsdk_pauseadapter.cpp",
+    "fpdfsdk/include/cpdfsdk_annot.h",
+    "fpdfsdk/include/cpdfsdk_baannot.h",
+    "fpdfsdk/include/cpdfsdk_datetime.h",
     "fpdfsdk/include/fsdk_actionhandler.h",
     "fpdfsdk/include/fsdk_annothandler.h",
-    "fpdfsdk/include/fsdk_baseannot.h",
     "fpdfsdk/include/fsdk_baseform.h",
     "fpdfsdk/include/fsdk_pauseadapter.h",
     "public/fpdf_dataavail.h",
     "public/fpdf_doc.h",
     "public/fpdf_edit.h",
     "public/fpdf_ext.h",
     "public/fpdf_flatten.h",
     "public/fpdf_formfill.h",
     "public/fpdf_fwlevent.h",
     "public/fpdf_ppo.h",
@@ skipping 1557 matching lines @@
 }
 
 if (pdf_is_standalone) {
   source_set("samples") {
     testonly = true
     deps = [
       "//samples",
     ]
   }
 }