[ic] Encode LoadGlobalIC's typeof mode in slot kind instead of code object's flags.

src/ic/ic.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_IC_H_
 #define V8_IC_H_
 
 #include "src/ic/ic-state.h"
 #include "src/macro-assembler.h"
 #include "src/messages.h"
@@ skipping 258 matching lines @@
 
 
 class LoadIC : public IC {
  public:
   LoadIC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL)
       : IC(depth, isolate, nexus) {
     DCHECK(nexus != NULL);
     DCHECK(IsLoadStub());
   }
 
+  static bool ShouldThrowReferenceError(FeedbackVectorSlotKind kind) {
+    return kind == FeedbackVectorSlotKind::LOAD_GLOBAL_NOT_INSIDE_TYPEOF_IC;
+  }
+
   bool ShouldThrowReferenceError() const {
-    return kind() == Code::LOAD_GLOBAL_IC &&
-           LoadGlobalICState::GetTypeofMode(extra_ic_state()) ==
-               NOT_INSIDE_TYPEOF;
+    return UseVector() && ShouldThrowReferenceError(
+                              nexus()->vector()->GetKind(nexus()->slot()));
   }
 
   MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object,
                                            Handle<Name> name);
 
   static void Clear(Isolate* isolate, Code* host, LoadICNexus* nexus);
 
  protected:
   virtual Handle<Code> slow_stub() const {
     return isolate()->builtins()->LoadIC_Slow();
@@ skipping 191 matching lines @@
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Isolate* isolate, Address address,
                          InlinedSmiCheck check);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_IC_H_