Add fpdf_edit basic creation embedder test.

fpdfsdk/src/fpdfedit_embeddertest.cpp

+// 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 "public/fpdf_edit.h"
+#include "public/fpdfview.h"
+#include "testing/embedder_test.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class FPDFEditEmbeddertest : public EmbedderTest {};
+
+TEST_F(FPDFEditEmbeddertest, EmptyCreation) {
+  EXPECT_TRUE(CreateEmptyDocument());
+  FPDF_PAGE page = FPDFPage_New(document(), 1, 640.0, 480.0);
+  EXPECT_NE(nullptr, page);
+  EXPECT_TRUE(FPDFPage_GenerateContent(page));
+  FPDFPage_Delete(document(), 1);
+}