Change asan_coverage(deprecated) flag to sanitizer_coverage. Enable edge-level code coverage by def…

scripts/slave/recipe_modules/chromium/client_v8_branches.py

 # Copyright 2014 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.
 
 from . import steps
 
 SPEC = {
   'settings': {
     'build_gs_bucket': 'chromium-v8',
   },
   'builders': {
     'Chromium ASAN (symbolized)': {
       'recipe_config': 'chromium_linux_asan',
       'chromium_apply_config': [
         'asan_symbolized',
-        'asan_coverage',
+        'sanitizer_coverage',
         'chromium_asan_default_targets',
         'v8_verify_heap',
       ],
       'gclient_apply_config': [
         'v8_bleeding_edge_git',
         'chromium_lkcr',
         'show_v8_revision',
       ],
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 64,
       },
       'bot_type': 'builder',
       'disable_tests': True,
       'cf_archive_build': True,
       'cf_gs_bucket': 'gs://v8-asan',
       'cf_archive_name': 'asan-symbolized',
       'cf_revision_dir': 'v8',
       'set_component_rev': {'name': 'src/v8', 'rev_str': '%s'},
       'testing': {'platform': 'linux'},
     },
   },
 }