MD Settings: only do downloads path normalization on ChromeOS

chrome/browser/resources/settings/downloads_page/downloads_page.js

Index: chrome/browser/resources/settings/downloads_page/downloads_page.js
diff --git a/chrome/browser/resources/settings/downloads_page/downloads_page.js b/chrome/browser/resources/settings/downloads_page/downloads_page.js
index 7603dad8f7812eeeba7c08cb3f97d580e44eb6a2..004e99c16a4ddd5d3df2477f4393c9463554b2c8 100644
--- a/chrome/browser/resources/settings/downloads_page/downloads_page.js
+++ b/chrome/browser/resources/settings/downloads_page/downloads_page.js
@@ -39,6 +39,7 @@ Polymer({
     chrome.send('selectDownloadLocation');
   },
 
+<if expr="chromeos">
   /**
    * @param {string} path
    * @return {string} The download location string that is suitable to display
@@ -55,4 +56,5 @@ Polymer({
     path = path.replace(/\//g, ' \u203a ');
     return path;
   },
+</if>
 });