[Isolates] Convert more static data either to read-only or to per-isolate.

test/cctest/test-accessors.cc

Index: test/cctest/test-accessors.cc
diff --git a/test/cctest/test-accessors.cc b/test/cctest/test-accessors.cc
index 12f0716f3e01a7beccc14d52e94ed34efe955a91..b74f166f65d2e6d524c7879c831f815c1c9b8fd7 100644
--- a/test/cctest/test-accessors.cc
+++ b/test/cctest/test-accessors.cc
@@ -397,9 +397,9 @@ static v8::Handle<Value> StackCheck(Local<String> name,
   for (int i = 0; !iter.done(); i++) {
     i::StackFrame* frame = iter.frame();
     CHECK(i != 0 || (frame->type() == i::StackFrame::EXIT));
-    CHECK(frame->code()->IsCode());
+    i::Code* code = frame->LookupCode(i::Isolate::Current());
+    CHECK(code->IsCode());
     i::Address pc = frame->pc();
-    i::Code* code = frame->code();
     CHECK(code->contains(pc));
     iter.Advance();
   }