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diff --git a/chromium/chrome/browser/resources/login/bubble.js b/chromium/chrome/browser/resources/login/bubble.js
new file mode 100644
index 00000000000..92bf987d51d
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+++ b/chromium/chrome/browser/resources/login/bubble.js
@@ -0,0 +1,359 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Bubble implementation.
+ */
+
+// TODO(xiyuan): Move this into shared.
+cr.define('cr.ui', function() {
+  /**
+   * Creates a bubble div.
+   * @constructor
+   * @extends {HTMLDivElement}
+   */
+  var Bubble = cr.ui.define('div');
+
+  /**
+   * Bubble key codes.
+   * @enum {number}
+   */
+  var KeyCodes = {
+    TAB: 9,
+    ENTER: 13,
+    ESC: 27,
+    SPACE: 32
+  };
+
+  /**
+   * Bubble attachment side.
+   * @enum {string}
+   */
+  Bubble.Attachment = {
+    RIGHT: 'bubble-right',
+    LEFT: 'bubble-left',
+    TOP: 'bubble-top',
+    BOTTOM: 'bubble-bottom'
+  };
+
+  Bubble.prototype = {
+    __proto__: HTMLDivElement.prototype,
+
+    // Anchor element for this bubble.
+    anchor_: undefined,
+
+    // If defined, sets focus to this element once bubble is closed. Focus is
+    // set to this element only if there's no any other focused element.
+    elementToFocusOnHide_: undefined,
+
+    // With help of these elements we create closed artificial tab-cycle through
+    // bubble elements.
+    firstBubbleElement_: undefined,
+    lastBubbleElement_: undefined,
+
+    // Whether to hide bubble when key is pressed.
+    hideOnKeyPress_: true,
+
+    /** @override */
+    decorate: function() {
+      this.docKeyDownHandler_ = this.handleDocKeyDown_.bind(this);
+      this.selfClickHandler_ = this.handleSelfClick_.bind(this);
+      this.ownerDocument.addEventListener('click',
+                                          this.handleDocClick_.bind(this));
+      this.ownerDocument.addEventListener('keydown',
+                                          this.docKeyDownHandler_);
+      window.addEventListener('blur', this.handleWindowBlur_.bind(this));
+      this.addEventListener('webkitTransitionEnd',
+                            this.handleTransitionEnd_.bind(this));
+      // Guard timer for 200ms + epsilon.
+      ensureTransitionEndEvent(this, 250);
+    },
+
+    /**
+     * Element that should be focused on hide.
+     * @type {HTMLElement}
+     */
+    set elementToFocusOnHide(value) {
+      this.elementToFocusOnHide_ = value;
+    },
+
+    /**
+     * Element that should be focused on shift-tab of first bubble element
+     * to create artificial closed tab-cycle through bubble.
+     * Usually close-button.
+     * @type {HTMLElement}
+     */
+    set lastBubbleElement(value) {
+      this.lastBubbleElement_ = value;
+    },
+
+    /**
+     * Element that should be focused on tab of last bubble element
+     * to create artificial closed tab-cycle through bubble.
+     * Same element as first focused on bubble opening.
+     * @type {HTMLElement}
+     */
+    set firstBubbleElement(value) {
+      this.firstBubbleElement_ = value;
+    },
+
+    /**
+     * Whether to hide bubble when key is pressed.
+     * @type {boolean}
+     */
+    set hideOnKeyPress(value) {
+      this.hideOnKeyPress_ = value;
+    },
+
+    /**
+     * Whether to hide bubble when clicked inside bubble element.
+     * Default is true.
+     * @type {boolean}
+     */
+    set hideOnSelfClick(value) {
+      if (value)
+        this.removeEventListener('click', this.selfClickHandler_);
+      else
+        this.addEventListener('click', this.selfClickHandler_);
+    },
+
+    /**
+     * Handler for click event which prevents bubble auto hide.
+     * @private
+     */
+    handleSelfClick_: function(e) {
+      // Allow clicking on [x] button.
+      if (e.target && e.target.classList.contains('close-button'))
+        return;
+      e.stopPropagation();
+    },
+
+    /**
+     * Sets the attachment of the bubble.
+     * @param {!Attachment} attachment Bubble attachment.
+     */
+    setAttachment_: function(attachment) {
+      for (var k in Bubble.Attachment) {
+        var v = Bubble.Attachment[k];
+        this.classList.toggle(v, v == attachment);
+      }
+    },
+
+    /**
+     * Shows the bubble for given anchor element.
+     * @param {!Object} pos Bubble position (left, top, right, bottom in px).
+     * @param {!Attachment} attachment Bubble attachment (on which side of the
+     *     specified position it should be displayed).
+     * @param {HTMLElement} opt_content Content to show in bubble.
+     *     If not specified, bubble element content is shown.
+     * @private
+     */
+    showContentAt_: function(pos, attachment, opt_content) {
+      this.style.top = this.style.left = this.style.right = this.style.bottom =
+          'auto';
+      for (var k in pos) {
+        if (typeof pos[k] == 'number')
+          this.style[k] = pos[k] + 'px';
+      }
+      if (opt_content !== undefined) {
+        this.innerHTML = '';
+        this.appendChild(opt_content);
+      }
+      this.setAttachment_(attachment);
+      this.hidden = false;
+      this.classList.remove('faded');
+    },
+
+    /**
+     * Shows the bubble for given anchor element. Bubble content is not cleared.
+     * @param {!HTMLElement} el Anchor element of the bubble.
+     * @param {!Attachment} attachment Bubble attachment (on which side of the
+     *     element it should be displayed).
+     * @param {number=} opt_offset Offset of the bubble.
+     * @param {number=} opt_padding Optional padding of the bubble.
+     */
+    showForElement: function(el, attachment, opt_offset, opt_padding) {
+      this.showContentForElement(
+          el, attachment, undefined, opt_offset, opt_padding);
+    },
+
+    /**
+     * Shows the bubble for given anchor element.
+     * @param {!HTMLElement} el Anchor element of the bubble.
+     * @param {!Attachment} attachment Bubble attachment (on which side of the
+     *     element it should be displayed).
+     * @param {HTMLElement} opt_content Content to show in bubble.
+     *     If not specified, bubble element content is shown.
+     * @param {number=} opt_offset Offset of the bubble attachment point from
+     *     left (for vertical attachment) or top (for horizontal attachment)
+     *     side of the element. If not specified, the bubble is positioned to
+     *     be aligned with the left/top side of the element but not farther than
+     *     half of its width/height.
+     * @param {number=} opt_padding Optional padding of the bubble.
+     */
+    showContentForElement: function(el, attachment, opt_content,
+                                    opt_offset, opt_padding) {
+      /** @const */ var ARROW_OFFSET = 25;
+      /** @const */ var DEFAULT_PADDING = 18;
+
+      if (opt_padding == undefined)
+        opt_padding = DEFAULT_PADDING;
+
+      var origin = cr.ui.login.DisplayManager.getPosition(el);
+      var offset = opt_offset == undefined ?
+          [Math.min(ARROW_OFFSET, el.offsetWidth / 2),
+           Math.min(ARROW_OFFSET, el.offsetHeight / 2)] :
+          [opt_offset, opt_offset];
+
+      var pos = {};
+      if (isRTL()) {
+        switch (attachment) {
+          case Bubble.Attachment.TOP:
+            pos.right = origin.right + offset[0] - ARROW_OFFSET;
+            pos.bottom = origin.bottom + el.offsetHeight + opt_padding;
+            break;
+          case Bubble.Attachment.RIGHT:
+            pos.top = origin.top + offset[1] - ARROW_OFFSET;
+            pos.right = origin.right + el.offsetWidth + opt_padding;
+            break;
+          case Bubble.Attachment.BOTTOM:
+            pos.right = origin.right + offset[0] - ARROW_OFFSET;
+            pos.top = origin.top + el.offsetHeight + opt_padding;
+            break;
+          case Bubble.Attachment.LEFT:
+            pos.top = origin.top + offset[1] - ARROW_OFFSET;
+            pos.left = origin.left + el.offsetWidth + opt_padding;
+            break;
+        }
+      } else {
+        switch (attachment) {
+          case Bubble.Attachment.TOP:
+            pos.left = origin.left + offset[0] - ARROW_OFFSET;
+            pos.bottom = origin.bottom + el.offsetHeight + opt_padding;
+            break;
+          case Bubble.Attachment.RIGHT:
+            pos.top = origin.top + offset[1] - ARROW_OFFSET;
+            pos.left = origin.left + el.offsetWidth + opt_padding;
+            break;
+          case Bubble.Attachment.BOTTOM:
+            pos.left = origin.left + offset[0] - ARROW_OFFSET;
+            pos.top = origin.top + el.offsetHeight + opt_padding;
+            break;
+          case Bubble.Attachment.LEFT:
+            pos.top = origin.top + offset[1] - ARROW_OFFSET;
+            pos.right = origin.right + el.offsetWidth + opt_padding;
+            break;
+        }
+      }
+
+      this.anchor_ = el;
+      this.showContentAt_(pos, attachment, opt_content);
+    },
+
+    /**
+     * Shows the bubble for given anchor element.
+     * @param {!HTMLElement} el Anchor element of the bubble.
+     * @param {string} text Text content to show in bubble.
+     * @param {!Attachment} attachment Bubble attachment (on which side of the
+     *     element it should be displayed).
+     * @param {number=} opt_offset Offset of the bubble attachment point from
+     *     left (for vertical attachment) or top (for horizontal attachment)
+     *     side of the element. If not specified, the bubble is positioned to
+     *     be aligned with the left/top side of the element but not farther than
+     *     half of its weight/height.
+     * @param {number=} opt_padding Optional padding of the bubble.
+     */
+    showTextForElement: function(el, text, attachment,
+                                 opt_offset, opt_padding) {
+      var span = this.ownerDocument.createElement('span');
+      span.textContent = text;
+      this.showContentForElement(el, attachment, span, opt_offset, opt_padding);
+    },
+
+    /**
+     * Hides the bubble.
+     */
+    hide: function() {
+      if (!this.classList.contains('faded'))
+        this.classList.add('faded');
+    },
+
+    /**
+     * Hides the bubble anchored to the given element (if any).
+     * @param {!Object} el Anchor element.
+     */
+    hideForElement: function(el) {
+      if (!this.hidden && this.anchor_ == el)
+        this.hide();
+    },
+
+    /**
+     * Handler for faded transition end.
+     * @private
+     */
+    handleTransitionEnd_: function(e) {
+      if (this.classList.contains('faded')) {
+        this.hidden = true;
+        if (this.elementToFocusOnHide_)
+          this.elementToFocusOnHide_.focus();
+      }
+    },
+
+    /**
+     * Handler of document click event.
+     * @private
+     */
+    handleDocClick_: function(e) {
+      // Ignore clicks on anchor element.
+      if (e.target == this.anchor_)
+        return;
+
+      if (!this.hidden)
+        this.hide();
+    },
+
+    /**
+     * Handle of document keydown event.
+     * @private
+     */
+    handleDocKeyDown_: function(e) {
+      if (this.hidden)
+        return;
+
+      if (this.hideOnKeyPress_) {
+        this.hide();
+        return;
+      }
+      // Artificial tab-cycle.
+      if (e.keyCode == KeyCodes.TAB && e.shiftKey == true &&
+          e.target == this.firstBubbleElement_) {
+        this.lastBubbleElement_.focus();
+        e.preventDefault();
+      }
+      if (e.keyCode == KeyCodes.TAB && e.shiftKey == false &&
+          e.target == this.lastBubbleElement_) {
+        this.firstBubbleElement_.focus();
+        e.preventDefault();
+      }
+      // Close bubble on ESC or on hitting spacebar or Enter at close-button.
+      if (e.keyCode == KeyCodes.ESC ||
+          ((e.keyCode == KeyCodes.ENTER || e.keyCode == KeyCodes.SPACE) &&
+             e.target && e.target.classList.contains('close-button')))
+        this.hide();
+    },
+
+    /**
+     * Handler of window blur event.
+     * @private
+     */
+    handleWindowBlur_: function(e) {
+      if (!this.hidden)
+        this.hide();
+    }
+  };
+
+  return {
+    Bubble: Bubble
+  };
+});