Revert "Compress memory usage. Imprive speed of finding exception handle..."

runtime/vm/raw_object.cc

Index: runtime/vm/raw_object.cc
diff --git a/runtime/vm/raw_object.cc b/runtime/vm/raw_object.cc
index c003f6e0fc26ad05d4f1a0d6e1da3357d4e0d2f7..2ec71374dfc625aa045dbb1782fc5c52ce6c5ddd 100644
--- a/runtime/vm/raw_object.cc
+++ b/runtime/vm/raw_object.cc
@@ -429,7 +429,7 @@ intptr_t RawCode::VisitCodePointers(RawCode* raw_obj,
 
   RawCode* obj = raw_obj->ptr();
   intptr_t length = obj->pointer_offsets_length_;
-  if (Code::AliveBit::decode(obj->state_bits_)) {
+  if (obj->is_alive_ == 1) {
     // Also visit all the embedded pointers in the corresponding instructions.
     uword entry_point = reinterpret_cast<uword>(obj->instructions_->ptr()) +
         Instructions::HeaderSize();