Fixing small error with is_distilable_trigger.js

Removing backslash that would cause JavaScript error.

BUG=383630

Review URL: https://codereview.chromium.org/474493003

Cr-Commit-Position: refs/heads/master@{#289527}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289527 0039d316-1c4b-4281-b951-d872f2087c98

components/dom_distiller/core/javascript/is_distillable_trigger.js

@@ -4,7 +4,7 @@
 
 (function() {
   var elems = document.querySelectorAll(
-      'meta[property="og:type"],meta[name=\\"og:type\\"]');
+      'meta[property="og:type"],meta[name="og:type"]');
   for (var i in elems) {
     if (elems[i].content && elems[i].content.toUpperCase() == 'ARTICLE') {
       return true;