ChromeOS: update alignment of user POD error bubble.

ui/login/bubble.js

Index: ui/login/bubble.js
diff --git a/ui/login/bubble.js b/ui/login/bubble.js
index 1340f28213b8cf3706e5e4abb6e81bfa8614c727..b17e3d4d30eadcc228b8e63748cd3c426dc95314 100644
--- a/ui/login/bubble.js
+++ b/ui/login/bubble.js
@@ -183,8 +183,8 @@ cr.define('cr.ui', function() {
      * @param {number=} opt_padding Optional padding of the bubble.
      */
     showContentForElement: function(el, attachment, opt_content,
-                                    opt_offset, opt_padding) {
-      /** @const */ var ARROW_OFFSET = 25;
+                                    opt_offset, opt_padding, opt_match_width) {
+      /** @const */ var ARROW_OFFSET = 0;
       /** @const */ var DEFAULT_PADDING = 18;
 
       if (opt_padding == undefined)
@@ -237,6 +237,16 @@ cr.define('cr.ui', function() {
             break;
         }
       }
+      this.style.width = '';
+      this.removeAttribute('match-width');
+      if (opt_match_width) {
+        this.setAttribute('match-width', '');
+        var el_width = window.getComputedStyle(el, null).getPropertyValue('width');
+        var padding_left = parseInt(window.getComputedStyle(this, null).getPropertyValue('padding-left'));
+        var padding_right = parseInt(window.getComputedStyle(this, null).getPropertyValue('padding-right'));
+        if (el_width)
+          this.style.width = (parseInt(el_width) - padding_left - padding_right) + 'px';
+      }
 
       this.anchor_ = el;
       this.showContentAt_(pos, opt_content);