Create a Factory for NativeMetafile.

printing/pdf_ps_metafile_cairo_unittest.cc

 // Copyright (c) 2011 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.
 
 #include "printing/pdf_ps_metafile_cairo.h"
 
 #include <fcntl.h>
 #include <string>
 #include <vector>
 
 #include "base/file_descriptor_posix.h"
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 typedef struct _cairo cairo_t;
 
+namespace {
+
 class PdfPsTest : public testing::Test {
  protected:
   base::FileDescriptor DevNullFD() {
     return base::FileDescriptor(open("/dev/null", O_WRONLY), true);
   }
 };
 
+}  // namespace
+
+namespace printing {
+
 TEST_F(PdfPsTest, Pdf) {
   // Tests in-renderer constructor.
   printing::PdfPsMetafile pdf;
   EXPECT_TRUE(pdf.Init());
 
   // Renders page 1.
   cairo_t* context = pdf.StartPage(72, 72, 1, 2, 3, 4);
   EXPECT_TRUE(context != NULL);
   EXPECT_EQ(printing::PdfPsMetafile::FromCairoContext(context), &pdf);
   // In theory, we should use Cairo to draw something on |context|.
@@ skipping 39 matching lines @@
   std::string test_raw_data = "Dummy PDF";
   EXPECT_TRUE(pdf3.SetRawData(test_raw_data.c_str(), test_raw_data.size()));
   EXPECT_TRUE(pdf3.FinishPage());
   pdf3.Close();
   size = pdf3.GetDataSize();
   EXPECT_EQ(test_raw_data.size(), size);
   std::string output;
   pdf3.GetData(WriteInto(&output, size + 1), size);
   EXPECT_EQ(test_raw_data, output);
 }
+
+}  // namespace printing