Harden more runtime functions.

src/arraybuffer.js

 // Copyright 2013 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 22 matching lines @@
 
 function ArrayBufferConstructor(length) { // length = 1
   if (%_IsConstructCall()) {
     var byteLength = ToPositiveInteger(length, 'invalid_array_buffer_length');
     %ArrayBufferInitialize(this, byteLength);
   } else {
     throw MakeTypeError('constructor_not_function', ["ArrayBuffer"]);
   }
 }
 
-function ArrayBufferGetByteLength() {
+function ArrayBufferGetByteLen() {
   if (!IS_ARRAYBUFFER(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['ArrayBuffer.prototype.byteLength', this]);
   }
   return %_ArrayBufferGetByteLength(this);
 }
 
 // ES6 Draft 15.13.5.5.3
 function ArrayBufferSlice(start, end) {
   if (!IS_ARRAYBUFFER(this)) {
@@ skipping 38 matching lines @@
 function SetUpArrayBuffer() {
   %CheckIsBootstrapping();
 
   // Set up the ArrayBuffer constructor function.
   %SetCode($ArrayBuffer, ArrayBufferConstructor);
   %FunctionSetPrototype($ArrayBuffer, new $Object());
 
   // Set up the constructor property on the ArrayBuffer prototype object.
   %SetProperty($ArrayBuffer.prototype, "constructor", $ArrayBuffer, DONT_ENUM);
 
-  InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLength);
+  InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLen);
 
   InstallFunctions($ArrayBuffer, DONT_ENUM, $Array(
       "isView", ArrayBufferIsView
   ));
 
   InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array(
       "slice", ArrayBufferSlice
   ));
 }
 
 SetUpArrayBuffer();