[coverage] Block coverage with support for IfStatements

src/debug/debug.cc

Index: src/debug/debug.cc
diff --git a/src/debug/debug.cc b/src/debug/debug.cc
index 2ba0a54d46c41e3f47c708fbef1a9b6daba56758..6f756daf48be5662435fde42ed1b25129579ce10 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -1618,6 +1618,19 @@ Handle<DebugInfo> Debug::GetOrCreateDebugInfo(
   return debug_info;
 }
 
+void Debug::InstallCoverageInfo(Handle<SharedFunctionInfo> shared,
+                                Handle<CoverageInfo> coverage_info) {
+  DCHECK(FLAG_block_coverage);
+  DCHECK(!coverage_info.is_null());
+
+  Handle<DebugInfo> debug_info = GetOrCreateDebugInfo(shared);
+
+  DCHECK(!debug_info->HasCoverageInfo());
+
+  debug_info->set_flags(debug_info->flags() | DebugInfo::kHasCoverageInfo);
+  debug_info->set_coverage_info(*coverage_info);
+}
+
 void Debug::FindDebugInfo(Handle<DebugInfo> debug_info,
                           DebugInfoListNode** prev, DebugInfoListNode** curr) {
   HandleScope scope(isolate_);