Unifying NativeMetafile class interface (as much as possible) for Linux, Mac, Win

printing/pdf_metafile_mac_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_metafile_mac.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 
 #include <string>
 #include <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/rect.h"
 
 namespace printing {
 
 TEST(PdfMetafileTest, Pdf) {
   // Test in-renderer constructor.
   printing::PdfMetafile pdf;
-  EXPECT_TRUE(pdf.Init() != NULL);
+  EXPECT_TRUE(pdf.Init());
+  EXPECT_TRUE(pdf.context() != NULL);
 
   // Render page 1 at origin (10.0, 10.0).
   gfx::Point origin_1(10.0f, 10.0f);
   gfx::Size size_1(540, 720);
   pdf.StartPage(size_1, origin_1, 1.25);
   pdf.FinishPage();
 
   // Render page 2 at origin (10.0, 10.0).
   gfx::Point origin_2(10.0f, 10.0f);
   gfx::Size size_2(720, 540);
@@ skipping 26 matching lines @@
   EXPECT_EQ(2U, pdf2.GetPageCount());
   gfx::Size page_size = pdf2.GetPageBounds(1).size();
   EXPECT_EQ(540, page_size.width());
   EXPECT_EQ(720, page_size.height());
   page_size = pdf2.GetPageBounds(2).size();
   EXPECT_EQ(720, page_size.width());
   EXPECT_EQ(540, page_size.height());
 }
 
 }  // namespace printing