[errors] Improve NotGeneric error message

test/mjsunit/messages.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --stack-size=100 --harmony
 
 function test(f, expected, type) {
   try {
     f();
   } catch (e) {
@@ skipping 174 matching lines @@
 test(function() {
   new Symbol();
 }, "Symbol is not a constructor", TypeError);
 
 // kNotDateObject
 test(function() {
   Date.prototype.getHours.call(1);
 }, "this is not a Date object.", TypeError);
 
 // kNotGeneric
-test(function() {
-  String.prototype.toString.call(1);
-}, "String.prototype.toString is not generic", TypeError);
+test(() => String.prototype.toString.call(1),
+    "String.prototype.toString requires that 'this' be a String",
+    TypeError);
 
-test(function() {
-  String.prototype.valueOf.call(1);
-}, "String.prototype.valueOf is not generic", TypeError);
+test(() => String.prototype.valueOf.call(1),
+    "String.prototype.valueOf requires that 'this' be a String",
+    TypeError);
 
-test(function() {
-  Boolean.prototype.toString.call(1);
-}, "Boolean.prototype.toString is not generic", TypeError);
+test(() => Boolean.prototype.toString.call(1),
+    "Boolean.prototype.toString requires that 'this' be a Boolean",
+    TypeError);
 
-test(function() {
-  Boolean.prototype.valueOf.call(1);
-}, "Boolean.prototype.valueOf is not generic", TypeError);
+test(() => Boolean.prototype.valueOf.call(1),
+    "Boolean.prototype.valueOf requires that 'this' be a Boolean",
+    TypeError);
 
-test(function() {
-  Number.prototype.toString.call({});
-}, "Number.prototype.toString is not generic", TypeError);
+test(() => Number.prototype.toString.call({}),
+    "Number.prototype.toString requires that 'this' be a Number",
+    TypeError);
 
-test(function() {
-  Number.prototype.valueOf.call({});
-}, "Number.prototype.valueOf is not generic", TypeError);
+test(() => Number.prototype.valueOf.call({}),
+    "Number.prototype.valueOf requires that 'this' be a Number",
+    TypeError);
 
-test(function() {
-  Function.prototype.toString.call(1);
-}, "Function.prototype.toString is not generic", TypeError);
+test(() => Function.prototype.toString.call(1),
+    "Function.prototype.toString requires that 'this' be a Function",
+    TypeError);
 
 // kNotTypedArray
 test(function() {
   Uint16Array.prototype.forEach.call(1);
 }, "this is not a typed array.", TypeError);
 
 // kObjectGetterExpectingFunction
 test(function() {
   ({}).__defineGetter__("x", 0);
 }, "Object.prototype.__defineGetter__: Expecting function", TypeError);
@@ skipping 217 matching lines @@
   Number(1).toString(100);
 }, "toString() radix argument must be between 2 and 36", RangeError);
 
 
 // === URIError ===
 
 // kURIMalformed
 test(function() {
   decodeURI("%%");
 }, "URI malformed", URIError);