tools: update ESLint, fix unused vars bug

Update ESLint to 3.0.0. This includes an enhancement to `no-unused-vars`
such that it finds a few instances in our code base that it did not find
previously (fixed in previous commits readying this for landing).

PR-URL: https://github.com/nodejs/node/pull/7601
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>

1 files changed, 3 insertions, 2 deletions

diff --git a/tools/eslint/lib/rules/no-mixed-spaces-and-tabs.js b/tools/eslint/lib/rules/no-mixed-spaces-and-tabs.js
index b3cdd38a60..74553f6511 100644
--- a/tools/eslint/lib/rules/no-mixed-spaces-and-tabs.js
+++ b/tools/eslint/lib/rules/no-mixed-spaces-and-tabs.js
@@ -24,6 +24,7 @@ module.exports = {
     },
 
     create: function(context) {
+        var sourceCode = context.getSourceCode();
 
         var smartTabs,
             ignoredLocs = [];
@@ -86,8 +87,8 @@ module.exports = {
                  */
                 var regex = /^(?=[\t ]*(\t | \t))/,
                     match,
-                    lines = context.getSourceLines(),
-                    comments = context.getAllComments();
+                    lines = sourceCode.lines,
+                    comments = sourceCode.getAllComments();
 
                 comments.forEach(function(comment) {
                     ignoredLocs.push(comment.loc);