Add macros to define comparison operators to compare by reference or pointer interchangeably

Source/wtf/Assertions.h

Index: Source/wtf/Assertions.h
diff --git a/Source/wtf/Assertions.h b/Source/wtf/Assertions.h
index 73fc317c6c5c2880275b8cc3bc2aa777acae5fc9..ca91dd2bcf039897f93153a6b7e186ac617cf999 100644
--- a/Source/wtf/Assertions.h
+++ b/Source/wtf/Assertions.h
@@ -362,6 +362,24 @@ static inline void UNREACHABLE_FOR_PLATFORM()
 #define RELEASE_ASSERT_NOT_REACHED() ASSERT_NOT_REACHED()
 #endif
 
+/* DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES */
+
+// Allow equality comparisons of Objects by reference or pointer, interchangeably.
+#define DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(thisType) \
+    inline bool operator==(const thisType& a, const thisType& b) { return &a == &b; } \
+    inline bool operator==(const thisType& a, const thisType* b) { return &a == b; } \
+    inline bool operator==(const thisType* a, const thisType& b) { return a == &b; } \
+    inline bool operator!=(const thisType& a, const thisType& b) { return !(a == b); } \
+    inline bool operator!=(const thisType& a, const thisType* b) { return !(a == b); } \
+    inline bool operator!=(const thisType* a, const thisType& b) { return !(a == b); }
+
+#define DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES_REFCOUNTED(thisType) \
+    DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(thisType) \
+    inline bool operator==(const PassRefPtr<thisType>& a, const thisType& b) { return a.get() == &b; } \
+    inline bool operator==(const thisType& a, const PassRefPtr<thisType>& b) { return &a == b.get(); } \
+    inline bool operator!=(const PassRefPtr<thisType>& a, const thisType& b) { return !(a == b); } \
+    inline bool operator!=(const thisType& a, const PassRefPtr<thisType>& b) { return !(a == b); }
+
 /* DEFINE_TYPE_CASTS */
 
 #define DEFINE_TYPE_CASTS(thisType, argumentType, argumentName, pointerPredicate, referencePredicate) \