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diff --git a/tools/eslint/node_modules/ccount/index.js b/tools/eslint/node_modules/ccount/index.js
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+++ b/tools/eslint/node_modules/ccount/index.js
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+/**
+ * @author Titus Wormer
+ * @copyright 2015 Titus Wormer
+ * @license MIT
+ * @module ccount
+ * @fileoverview Count characters.
+ */
+
+'use strict';
+
+/* Expose. */
+module.exports = ccount;
+
+/**
+ * Count how many characters `character` occur in `value`.
+ *
+ * @example
+ *   ccount('foo(bar(baz)', '(') // 2
+ *   ccount('foo(bar(baz)', ')') // 1
+ *
+ * @param {string} value - Content, coerced to string.
+ * @param {string} character - Single character to look
+ *   for.
+ * @return {number} - Count.
+ * @throws {Error} - when `character` is not a single
+ *   character.
+ */
+function ccount(value, character) {
+  var count = 0;
+  var index;
+
+  value = String(value);
+
+  if (typeof character !== 'string' || character.length !== 1) {
+    throw new Error('Expected character');
+  }
+
+  index = value.indexOf(character);
+
+  while (index !== -1) {
+    count++;
+    index = value.indexOf(character, index + 1);
+  }
+
+  return count;
+}