Attach snapshot data blob to the isolate.

src/full-codegen.cc

Index: src/full-codegen.cc
diff --git a/src/full-codegen.cc b/src/full-codegen.cc
index 6f43497a799ed73d0d6b1c6845d6bfcb400fb36f..6d9bea29559c6b8d25043a00739db40073a8b094 100644
--- a/src/full-codegen.cc
+++ b/src/full-codegen.cc
@@ -422,9 +422,8 @@ void FullCodeGenerator::Initialize() {
   // calculating PC offsets after generating a debug version of code.  Therefore
   // we disable the production of debug code in the full compiler if we are
   // either generating a snapshot or we booted from a snapshot.
-  generate_debug_code_ = FLAG_debug_code &&
-                         !masm_->serializer_enabled() &&
-                         !Snapshot::HaveASnapshotToStartFrom();
+  generate_debug_code_ = FLAG_debug_code && !masm_->serializer_enabled() &&
+                         !info_->isolate()->snapshot_available();
   masm_->set_emit_debug_code(generate_debug_code_);
   masm_->set_predictable_code_size(true);
 }