[snapshot, heap] Move clearing of marked descriptors to deserializer

Since code serializer also serializers descriptor arrays, the clearing
has to be done in deserializer.

Bug: v8:8486
Change-Id: Ic2c5848e5add80176a6f7191c56e7af9e9a6019f
Reviewed-on: https://chromium-review.googlesource.com/c/1388532Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58439}

src/snapshot/deserializer.cc

@@ -323,6 +323,10 @@ HeapObject Deserializer::PostProcessNewObject(HeapObject obj, int space) {
     bytecode_array->set_interrupt_budget(
         interpreter::Interpreter::InterruptBudget());
     bytecode_array->set_osr_loop_nesting_level(0);
+  } else if (obj->IsDescriptorArray()) {
+    // Reset the marking state of the descriptor array.
+    DescriptorArray descriptor_array = DescriptorArray::cast(obj);
+    descriptor_array->set_raw_number_of_marked_descriptors(0);
   }
 
   // Check alignment.

src/snapshot/serializer.cc

@@ -565,10 +565,6 @@ void Serializer::ObjectSerializer::Serialize() {
       SeqOneByteString::cast(object_)->clear_padding();
     } else if (object_->IsSeqTwoByteString()) {
       SeqTwoByteString::cast(object_)->clear_padding();
-    } else if (object_->IsDescriptorArray()) {
-      // Reset the marking state of the descriptor array.
-      DescriptorArray descriptor_array = DescriptorArray::cast(object_);
-      descriptor_array->set_raw_number_of_marked_descriptors(0);
     }
   }
   if (object_->IsJSTypedArray()) {