Add skia::RefPtr class to wrap ref counted classes from Skia.

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1582 matching lines @@
         '../google_apis/gaia/oauth_request_signer_unittest.cc',
         '../google_apis/gaia/oauth2_access_token_fetcher_unittest.cc',
         '../google_apis/gaia/oauth2_api_call_flow_unittest.cc',
         '../google_apis/gaia/oauth2_mint_token_fetcher_unittest.cc',
         '../google_apis/gaia/oauth2_mint_token_flow_unittest.cc',
         '../google_apis/gaia/oauth2_revocation_fetcher_unittest.cc',
         '../skia/ext/bitmap_platform_device_mac_unittest.cc',
         '../skia/ext/convolver_unittest.cc',
         '../skia/ext/image_operations_unittest.cc',
         '../skia/ext/platform_canvas_unittest.cc',
+        '../skia/ext/refptr_unittest.cc',
         '../skia/ext/skia_utils_ios_unittest.mm',
         '../skia/ext/skia_utils_mac_unittest.mm',
         '../skia/ext/vector_canvas_unittest.cc',
         '../testing/gtest_mac_unittest.mm',
         '../third_party/cld/encodings/compact_lang_det/compact_lang_det_unittest_small.cc',
         '../tools/json_schema_compiler/test/additional_properties_unittest.cc',
         '../tools/json_schema_compiler/test/any_unittest.cc',
         '../tools/json_schema_compiler/test/arrays_unittest.cc',
         '../tools/json_schema_compiler/test/callbacks_unittest.cc',
         '../tools/json_schema_compiler/test/choices_unittest.cc',
@@ skipping 677 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }