Add a Retained Pointer smart class.

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 503 matching lines @@
           # core/fxcodec/fx_libopenjpeg/src/fx_mct.c does an pointer-to-int
           # conversion to check that an address is 16-bit aligned (benign).
           'cflags_c': [ '-Wno-pointer-to-int-cast' ],
         }],
       ],
     },
     {
       'target_name': 'fxcrt',
       'type': 'static_library',
       'sources': [
+        'core/include/fxcrt/cfx_retain_ptr.h',
         'core/include/fxcrt/fx_basic.h',
         'core/include/fxcrt/fx_bidi.h',
         'core/include/fxcrt/fx_coordinates.h',
         'core/include/fxcrt/fx_ext.h',
         'core/include/fxcrt/fx_memory.h',
         'core/include/fxcrt/fx_safe_types.h',
         'core/include/fxcrt/fx_stream.h',
         'core/include/fxcrt/fx_string.h',
         'core/include/fxcrt/fx_system.h',
         'core/include/fxcrt/fx_ucd.h',
@@ skipping 283 matching lines @@
     {
       'target_name': 'pdfium_unittests',
       'type': 'executable',
       'dependencies': [
         '<(DEPTH)/testing/gtest.gyp:gtest_main',
         '<(DEPTH)/testing/gtest.gyp:gtest',
         'pdfium',
         'test_support',
       ],
       'sources': [
+        'core/fxcrt/cfx_retain_ptr_unittest.cpp',
         'core/fpdfapi/fpdf_font/fpdf_font_cid_unittest.cpp',
         'core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp',
         'core/fpdfapi/fpdf_page/fpdf_page_parser_old_unittest.cpp',
         'core/fpdfapi/fpdf_parser/cpdf_object_unittest.cpp',
         'core/fpdfapi/fpdf_parser/cpdf_parser_unittest.cpp',
         'core/fpdfapi/fpdf_parser/cpdf_simple_parser_unittest.cpp',
         'core/fpdfapi/fpdf_parser/cpdf_syntax_parser_unittest.cpp',
         'core/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp',
         'core/fpdfdoc/doc_basic_unittest.cpp',
         'core/fpdftext/fpdf_text_int_unittest.cpp',
@@ skipping 119 matching lines @@
             'fpdfsdk/include/fpdfxfa/fpdfxfa_app.h',
             'fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h',
             'fpdfsdk/include/fpdfxfa/fpdfxfa_page.h',
             'fpdfsdk/include/fpdfxfa/fpdfxfa_util.h',
           ],
         },
       ]
     }],
   ]
 }