VM: Remove ZoneCompileType class.

runtime/vm/intrinsifier.cc

Index: runtime/vm/intrinsifier.cc
diff --git a/runtime/vm/intrinsifier.cc b/runtime/vm/intrinsifier.cc
index 26573ce1098e26a1cb2370fe7d0bc1f8059d9b61..9c6d9eef36ee37b4b50dd56d17d2dfc69e98fcc3 100644
--- a/runtime/vm/intrinsifier.cc
+++ b/runtime/vm/intrinsifier.cc
@@ -329,8 +329,8 @@ class BlockBuilder : public ValueObject {
       // The type of |value| has already been checked and it is safe to
       // adjust reaching type. This is done manually because there is no type
       // propagation when building intrinsics.
-      unboxed_value->AsUnbox()->value()->SetReachingType(ZoneCompileType::Wrap(
-          CompileType::FromCid(CidForRepresentation(rep))));
+      unboxed_value->AsUnbox()->value()->SetReachingType(
+          new CompileType(CompileType::FromCid(CidForRepresentation(rep))));
     }
     return unboxed_value;
   }