CPDF_Document::LoadPattern() and friends always have a valid matrix.

pdfium.gyp

 # Copyright 2015 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.
 
 {
   'variables': {
     # TODO(thakis): Enable this, pdfium:29
     #'chromium_code': 1,
 
     'variables': {
@@ skipping 392 matching lines @@
         'core/fpdfapi/fpdf_page/cpdf_textstate.cpp',
         'core/fpdfapi/fpdf_page/cpdf_textstate.h',
         'core/fpdfapi/fpdf_page/cpdf_textstatedata.cpp',
         'core/fpdfapi/fpdf_page/cpdf_tilingpattern.cpp',
         'core/fpdfapi/fpdf_page/cpdf_tilingpattern.h',
         'core/fpdfapi/fpdf_page/fpdf_page_colors.cpp',
         'core/fpdfapi/fpdf_page/fpdf_page_doc.cpp',
         'core/fpdfapi/fpdf_page/fpdf_page_func.cpp',
         'core/fpdfapi/fpdf_page/fpdf_page_parser.cpp',
         'core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp',
-        'core/fpdfapi/fpdf_page/fpdf_page_pattern.cpp',
         'core/fpdfapi/fpdf_page/include/cpdf_clippath.h',
         'core/fpdfapi/fpdf_page/include/cpdf_color.h',
         'core/fpdfapi/fpdf_page/include/cpdf_colorspace.h',
         'core/fpdfapi/fpdf_page/include/cpdf_form.h',
         'core/fpdfapi/fpdf_page/include/cpdf_formobject.h',
         'core/fpdfapi/fpdf_page/include/cpdf_generalstatedata.h',
         'core/fpdfapi/fpdf_page/include/cpdf_image.h',
         'core/fpdfapi/fpdf_page/include/cpdf_imageobject.h',
         'core/fpdfapi/fpdf_page/include/cpdf_page.h',
         'core/fpdfapi/fpdf_page/include/cpdf_pageobject.h',
@@ skipping 646 matching lines @@
             'fpdfsdk/fpdfxfa/include/fpdfxfa_app.h',
             'fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h',
             'fpdfsdk/fpdfxfa/include/fpdfxfa_page.h',
             'fpdfsdk/fpdfxfa/include/fpdfxfa_util.h',
           ],
         },
       ]
     }],
   ]
 }