[coverage] Block coverage with support for IfStatements

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 606b6e4b5499f43296bbeaf6fc63f2887f17a88a..8fb8c2fa72b38f6cc164820e93f9dd73c01e63a5 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -2483,6 +2483,7 @@ Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
   share->set_instance_class_name(*Object_string());
   share->set_script(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_debug_info(Smi::kZero, SKIP_WRITE_BARRIER);
+  share->set_coverage_info(Smi::kZero, SKIP_WRITE_BARRIER);
   share->set_function_identifier(*undefined_value(), SKIP_WRITE_BARRIER);
   StaticFeedbackVectorSpec empty_spec;
   Handle<FeedbackMetadata> feedback_metadata =
@@ -2615,6 +2616,22 @@ Handle<DebugInfo> Factory::NewDebugInfo(Handle<SharedFunctionInfo> shared) {
   return debug_info;
 }
 
+Handle<CoverageInfo> Factory::NewCoverageInfo(
+    const ZoneVector<SourceRange>& slots) {
+  const int slot_count = static_cast<int>(slots.size());
+
+  const int length = CoverageInfo::FixedArrayLengthForSlotCount(slot_count);
+  Handle<CoverageInfo> info =
+      Handle<CoverageInfo>::cast(NewUninitializedFixedArray(length));
+
+  for (int i = 0; i < slot_count; i++) {
+    SourceRange range = slots[i];
+    info->InitializeSlot(i, range.from, range.to);
+  }
+
+  return info;
+}
+
 Handle<BreakPointInfo> Factory::NewBreakPointInfo(int source_position) {
   Handle<BreakPointInfo> new_break_point_info =
       Handle<BreakPointInfo>::cast(NewStruct(TUPLE2_TYPE));