Add `CheckObjectCoercible` for the `String.prototype` HTML methods

src/string.js

 // Copyright 2012 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.
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $String = global.String;
 
 // -------------------------------------------------------------------
 
@@ skipping 821 matching lines @@
   return TO_STRING_INLINE(str).replace(/</g, "&lt;")
                               .replace(/>/g, "&gt;")
                               .replace(/"/g, "&quot;")
                               .replace(/'/g, "&#039;");
 }
 
 
 // Compatibility support for KJS.
 // Tested by mozilla/js/tests/js1_5/Regress/regress-276103.js.
 function StringLink(s) {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.link");

[Yang, 2014/08/05 10:34:19]

Now that all of this is specified in ES6, do you mind adding the references to
the sections in the ES6 draft (including draft date)?

   return "<a href=\"" + HtmlEscape(s) + "\">" + this + "</a>";
 }
 
 
 function StringAnchor(name) {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.anchor");
   return "<a name=\"" + HtmlEscape(name) + "\">" + this + "</a>";
 }
 
 
 function StringFontcolor(color) {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontcolor");
   return "<font color=\"" + HtmlEscape(color) + "\">" + this + "</font>";
 }
 
 
 function StringFontsize(size) {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontsize");
   return "<font size=\"" + HtmlEscape(size) + "\">" + this + "</font>";
 }
 
 
 function StringBig() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.big");
   return "<big>" + this + "</big>";
 }
 
 
 function StringBlink() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.blink");
   return "<blink>" + this + "</blink>";
 }
 
 
 function StringBold() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.bold");
   return "<b>" + this + "</b>";
 }
 
 
 function StringFixed() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.fixed");
   return "<tt>" + this + "</tt>";
 }
 
 
 function StringItalics() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.italics");
   return "<i>" + this + "</i>";
 }
 
 
 function StringSmall() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.small");
   return "<small>" + this + "</small>";
 }
 
 
 function StringStrike() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.strike");
   return "<strike>" + this + "</strike>";
 }
 
 
 function StringSub() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.sub");
   return "<sub>" + this + "</sub>";
 }
 
 
 function StringSup() {
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.sup");
   return "<sup>" + this + "</sup>";
 }
 
 // -------------------------------------------------------------------
 
 function SetUpString() {
   %CheckIsBootstrapping();
 
   // Set the String function and constructor.
   %SetCode($String, StringConstructor);
@@ skipping 42 matching lines @@
     "fixed", StringFixed,
     "italics", StringItalics,
     "small", StringSmall,
     "strike", StringStrike,
     "sub", StringSub,
     "sup", StringSup
   ));
 }
 
 SetUpString();