Break xfa_parser_imp apart

xfa/fxfa/parser/cxfa_simple_parser_embeddertest.cpp

-// Copyright 2015 PDFium Authors. All rights reserved.
+// Copyright 2016 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.
 
 #include "testing/embedder_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-class XFAParserImpEmbeddertest : public EmbedderTest {};
+class CXFASimpleParserEmbeddertest : public EmbedderTest {};
 
-TEST_F(XFAParserImpEmbeddertest, Bug_216) {
+TEST_F(CXFASimpleParserEmbeddertest, Bug_216) {
   EXPECT_TRUE(OpenDocument("bug_216.pdf"));
   FPDF_PAGE page = LoadPage(0);
   EXPECT_NE(nullptr, page);
   UnloadPage(page);
 }