Make DOMException extend Error (microsoft#1100)

Author: PaperStrike

baselines/dom.generated.d.ts

@@ -3675,7 +3675,7 @@ declare var CustomEvent: {
 };
 
 /** An abnormal event (called an exception) which occurs as a result of calling a method or accessing a property of a web API. */
-interface DOMException {
+interface DOMException extends Error {
     readonly code: number;
     readonly message: string;
     readonly name: string;

baselines/serviceworker.generated.d.ts

@@ -948,7 +948,7 @@ declare var CustomEvent: {
 };
 
 /** An abnormal event (called an exception) which occurs as a result of calling a method or accessing a property of a web API. */
-interface DOMException {
+interface DOMException extends Error {
     readonly code: number;
     readonly message: string;
     readonly name: string;

baselines/sharedworker.generated.d.ts

@@ -892,7 +892,7 @@ declare var CustomEvent: {
 };
 
 /** An abnormal event (called an exception) which occurs as a result of calling a method or accessing a property of a web API. */
-interface DOMException {
+interface DOMException extends Error {
     readonly code: number;
     readonly message: string;
     readonly name: string;

baselines/webworker.generated.d.ts

@@ -959,7 +959,7 @@ declare var CustomEvent: {
 };
 
 /** An abnormal event (called an exception) which occurs as a result of calling a method or accessing a property of a web API. */
-interface DOMException {
+interface DOMException extends Error {
     readonly code: number;
     readonly message: string;
     readonly name: string;

inputfiles/overridingTypes.jsonc

@@ -1575,6 +1575,9 @@
                     }
                 }
             },
+            "DOMException": {
+                "extends": "Error"
+            },
             "DOMStringMap": {
                 "overrideIndexSignatures": [
                     "[name: string]: string | undefined"