benchmark: use strict mode

Apply strict mode to benchmark code.

PR-URL: https://github.com/nodejs/node/pull/5336
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

benchmark/path/basename-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/basename-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/dirname-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/dirname-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/extname-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/extname-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/format-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/format-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/isAbsolute-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/isAbsolute-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/join-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/join-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/makeLong-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/normalize-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/normalize-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/parse-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/parse-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/relative-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/relative-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/resolve-posix.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');

benchmark/path/resolve-win32.js

@@ -1,3 +1,4 @@
+'use strict';
 var common = require('../common.js');
 var path = require('path');
 var v8 = require('v8');