Use new sanitizer coverage flags.

-fsanitize-coverage={edge,bb,func} are deprecated.

-fsanitize-coverage={edge,bb,func},trace-pc-guard should be used instead (edge is default).

BUG=chromium:651540

Review-Url: https://codereview.chromium.org/2860653002
Cr-Commit-Position: refs/heads/master@{#45072}

gypfiles/coverage_wrapper.py

@@ -31,6 +31,8 @@ for exclusion in exclusions:
     remove_if_exists(args, '-fsanitize-coverage=func')
     remove_if_exists(args, '-fsanitize-coverage=bb')
     remove_if_exists(args, '-fsanitize-coverage=edge')
+    remove_if_exists(args, '-fsanitize-coverage=trace-pc-guard')
+    remove_if_exists(args, '-fsanitize-coverage=bb,trace-pc-guard')
     break
 
 sys.exit(subprocess.check_call(args))

infra/mb/mb_config.pyl

@@ -499,8 +499,8 @@
     },
 
     'bb': {
-      'gn_args': 'sanitizer_coverage_flags="bb"',
-      'gyp_defines': 'sanitizer_coverage=bb',
+      'gn_args': 'sanitizer_coverage_flags="bb,trace-pc-guard"',
+      'gyp_defines': 'sanitizer_coverage=bb,trace-pc-guard',
     },
 
     'cfi': {
@@ -549,8 +549,8 @@
     },
 
     'edge': {
-      'gn_args': 'sanitizer_coverage_flags="edge"',
-      'gyp_defines': 'sanitizer_coverage=edge',
+      'gn_args': 'sanitizer_coverage_flags="trace-pc-guard"',
+      'gyp_defines': 'sanitizer_coverage=trace-pc-guard',
     },
 
     'gcc': {

tools/testrunner/testrunner.isolate

@@ -12,7 +12,7 @@
     ],
   },
   'conditions': [
-    ['coverage==1 and sanitizer_coverage=="bb"', {
+    ['coverage==1 and sanitizer_coverage=="bb,trace-pc-guard"', {
       'variables': {
         'files': [
           '../sanitizers/sancov_merger.py',