Store both major and minor key on code stubs.

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
index adf1f7162a7a7ae88c3506f05ba4a8195506580c..1b7b4dfaca0dadd57b02a097694ce1a512ec900f 100644
--- a/src/liveedit.cc
+++ b/src/liveedit.cc
@@ -1638,7 +1638,7 @@ static const char* DropFrames(Vector<StackFrame*> frames,
              isolate->builtins()->builtin(Builtins::kReturn_DebugBreak)) {
     *mode = LiveEdit::FRAME_DROPPED_IN_RETURN_CALL;
   } else if (pre_top_frame_code->kind() == Code::STUB &&
-      pre_top_frame_code->major_key() == CodeStub::CEntry) {
+             CodeStub::GetMajorKey(pre_top_frame_code) == CodeStub::CEntry) {
     // Entry from our unit tests on 'debugger' statement.
     // It's fine, we support this case.
     *mode = LiveEdit::FRAME_DROPPED_IN_DIRECT_CALL;