[Intepreter] Don't throw reference errors for globals in typeof.

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index 66dd1e3c1c2797afa79db8f86f0b6bc449e809d7..7284cfe9e18a41ae7454af1333872dcc7f59a922 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -60,11 +60,14 @@ class BytecodeGenerator : public AstVisitor {
   void VisitPropertyLoad(Register obj, Property* expr);
   void VisitPropertyLoadForAccumulator(Register obj, Property* expr);
 
-  void VisitVariableLoad(Variable* variable, FeedbackVectorSlot slot);
-  void VisitVariableLoadForAccumulatorValue(Variable* variable,
-                                            FeedbackVectorSlot slot);
-  MUST_USE_RESULT Register VisitVariableLoadForRegisterValue(
-      Variable* variable, FeedbackVectorSlot slot);
+  void VisitVariableLoad(Variable* variable, FeedbackVectorSlot slot,
+                         TypeofMode typeof_mode = NOT_INSIDE_TYPEOF);
+  void VisitVariableLoadForAccumulatorValue(
+      Variable* variable, FeedbackVectorSlot slot,
+      TypeofMode typeof_mode = NOT_INSIDE_TYPEOF);
+  MUST_USE_RESULT Register
+  VisitVariableLoadForRegisterValue(Variable* variable, FeedbackVectorSlot slot,
+                                    TypeofMode typeof_mode = NOT_INSIDE_TYPEOF);
   void VisitVariableAssignment(Variable* variable, FeedbackVectorSlot slot);
 
   void VisitArgumentsObject(Variable* variable);