Add tests for CBA_AnnotIterator.

BUILD.gn

 # Copyright 2014 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_config") {
   cflags = []
@@ skipping 741 matching lines @@
     "fpdfsdk/src/fpdf_dataavail_embeddertest.cpp",
     "fpdfsdk/src/fpdfdoc_embeddertest.cpp",
     "fpdfsdk/src/fpdfedit_embeddertest.cpp",
     "fpdfsdk/src/fpdfext_embeddertest.cpp",
     "fpdfsdk/src/fpdfformfill_embeddertest.cpp",
     "fpdfsdk/src/fpdfsave_embeddertest.cpp",
     "fpdfsdk/src/fpdftext_embeddertest.cpp",
     "fpdfsdk/src/fpdfview_c_api_test.c",
     "fpdfsdk/src/fpdfview_c_api_test.h",
     "fpdfsdk/src/fpdfview_embeddertest.cpp",
+    "fpdfsdk/src/fsdk_baseform_embeddertest.cpp",
     "testing/embedder_test.cpp",
     "testing/embedder_test.h",
     "testing/embedder_test_mock_delegate.h",
     "testing/embedder_test_timer_handling_delegate.h",
   ]
   deps = [
     "//testing/gmock",
     "//testing/gtest",
     ":pdfium",
     ":test_support",
@@ skipping 11 matching lines @@
       "//v8:v8_libplatform",
     ]
     include_dirs += [
       "//v8",
       "//v8/include",
     ]
     configs += [ "//v8:external_startup_data" ]
   }
   configs += [ ":pdfium_config" ]
 }