Renamed "symbols" to "internalized strings" throughout the code base,

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2424 matching lines @@
  public:
   static HCheckInstanceType* NewIsSpecObject(HValue* value, Zone* zone) {
     return new(zone) HCheckInstanceType(value, IS_SPEC_OBJECT);
   }
   static HCheckInstanceType* NewIsJSArray(HValue* value, Zone* zone) {
     return new(zone) HCheckInstanceType(value, IS_JS_ARRAY);
   }
   static HCheckInstanceType* NewIsString(HValue* value, Zone* zone) {
     return new(zone) HCheckInstanceType(value, IS_STRING);
   }
-  static HCheckInstanceType* NewIsSymbol(HValue* value, Zone* zone) {
-    return new(zone) HCheckInstanceType(value, IS_SYMBOL);
+  static HCheckInstanceType* NewIsInternalizedString(
+      HValue* value, Zone* zone) {
+    return new(zone) HCheckInstanceType(value, IS_INTERNALIZED_STRING);
   }
 
   virtual void PrintDataTo(StringStream* stream);
 
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::Tagged();
   }
 
   virtual HValue* Canonicalize();
 
@@ skipping 10 matching lines @@
   virtual bool DataEquals(HValue* other) {
     HCheckInstanceType* b = HCheckInstanceType::cast(other);
     return check_ == b->check_;
   }
 
  private:
   enum Check {
     IS_SPEC_OBJECT,
     IS_JS_ARRAY,
     IS_STRING,
-    IS_SYMBOL,
+    IS_INTERNALIZED_STRING,
     LAST_INTERVAL_CHECK = IS_JS_ARRAY
   };
 
   const char* GetCheckName();
 
   HCheckInstanceType(HValue* value, Check check)
       : HUnaryOperation(value), check_(check) {
     set_representation(Representation::Tagged());
     SetFlag(kUseGVN);
   }
@@ skipping 3255 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_