cc: Gather and lock/unlock SkDiscardablePixelRefs instead of skia::LazyPixelRefs.

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 1984 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_flow_unittest.cc',
         '../google_apis/gaia/oauth2_token_service_test_util.cc',
         '../google_apis/gaia/oauth2_token_service_test_util.h',
         '../google_apis/gaia/oauth2_token_service_unittest.cc',
         '../skia/ext/analysis_canvas_unittest.cc',
         '../skia/ext/bitmap_platform_device_mac_unittest.cc',
         '../skia/ext/convolver_unittest.cc',
+        '../skia/ext/discardable_pixel_ref_utils_unittest.cc',
         '../skia/ext/image_operations_unittest.cc',
-        '../skia/ext/lazy_pixel_ref_utils_unittest.cc',
         '../skia/ext/platform_canvas_unittest.cc',
         '../skia/ext/recursive_gaussian_convolution_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/zlib/google/zip_reader_unittest.cc',
         '../third_party/zlib/google/zip_unittest.cc',
         '../tools/json_schema_compiler/test/additional_properties_unittest.cc',
@@ skipping 884 matching lines @@
             'browser/ui/app_list/test/fake_profile_store.h',
             'browser/ui/app_list/test/fast_show_pickler_unittest.cc',
             'browser/ui/views/app_list/linux/app_list_linux_unittest.cc',
             'browser/ui/views/app_list/win/app_list_win_unittest.cc',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }