Avoid bool to Oddball conversions by being lazy.

src/objects.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 1037 matching lines @@
   inline double Number();
   inline bool IsNaN();
 
   // Returns true if the object is of the correct type to be used as a
   // implementation of a JSObject's elements.
   inline bool HasValidElements();
 
   inline bool HasSpecificClassOf(String* name);
 
   MUST_USE_RESULT MaybeObject* ToObject();             // ECMA-262 9.9.
-  Object* ToBoolean();                                 // ECMA-262 9.2.
+  bool BooleanValue();                                 // ECMA-262 9.2.
 
   // Convert to a JSObject if needed.
   // native_context is used when creating wrapper object.
   MUST_USE_RESULT MaybeObject* ToObject(Context* native_context);
 
   // Converts this to a Smi if possible.
   // Failure is returned otherwise.
   MUST_USE_RESULT inline MaybeObject* ToSmi();
 
   void Lookup(Name* name, LookupResult* result);
@@ skipping 389 matching lines @@
 class HeapNumber: public HeapObject {
  public:
   // [value]: number value.
   inline double value();
   inline void set_value(double value);
 
   // Casting.
   static inline HeapNumber* cast(Object* obj);
 
   // Dispatched behavior.
-  Object* HeapNumberToBoolean();
+  bool HeapNumberBooleanValue();
+
   inline void HeapNumberPrint() {
     HeapNumberPrint(stdout);
   }
   void HeapNumberPrint(FILE* out);
   void HeapNumberPrint(StringStream* accumulator);
   DECLARE_VERIFIER(HeapNumber)
 
   inline int get_exponent();
   inline int get_sign();
 
@@ skipping 7767 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_