Support BottomType in the VM Kernel reader

runtime/vm/kernel_binary.cc

Index: runtime/vm/kernel_binary.cc
diff --git a/runtime/vm/kernel_binary.cc b/runtime/vm/kernel_binary.cc
index e7b25c9a2347821770517b9c67d3a134431afdec..311a69a112af6cce29d1d281df5003147227bb8d 100644
--- a/runtime/vm/kernel_binary.cc
+++ b/runtime/vm/kernel_binary.cc
@@ -1381,6 +1381,8 @@ DartType* DartType::ReadFrom(Reader* reader) {
       return DynamicType::ReadFrom(reader);
     case kVoidType:
       return VoidType::ReadFrom(reader);
+    case kBottomType:
+      return BottomType::ReadFrom(reader);
     case kInterfaceType:
       return InterfaceType::ReadFrom(reader);
     case kSimpleInterfaceType:
@@ -1421,6 +1423,12 @@ VoidType* VoidType::ReadFrom(Reader* reader) {
 }
 
 
+BottomType* BottomType::ReadFrom(Reader* reader) {
+  TRACE_READ_OFFSET();
+  return new BottomType();
+}
+
+
 InterfaceType* InterfaceType::ReadFrom(Reader* reader) {
   TRACE_READ_OFFSET();
   intptr_t klass_name = Reference::ReadClassFrom(reader);