[MD Settings][People] Profile Avatar Selector won't lose focus on pressing esc

ui/webui/resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector_grid.js

Index: ui/webui/resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector_grid.js
diff --git a/ui/webui/resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector_grid.js b/ui/webui/resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector_grid.js
index 9528c07df15f3198fa4e95680f22d4da23828928..8d75dd5598f733a09d923e2c15f51d1655918b37 100644
--- a/ui/webui/resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector_grid.js
+++ b/ui/webui/resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector_grid.js
@@ -35,6 +35,15 @@ Polymer({
   },
 
   /**
+   * Handler that is called when the esc key is pressed.
+   * @param {CustomEvent} event A key combination event.
+   * @private
+   */
+  _onEscKey: function(event) {
+    // Override the original behavior by doing nothing.
+  },
+
+  /**
    * Focuses an item on the same column as the currently focused item and on a
    * row below or above the focus row by the given offset. Focus wraps if
    * necessary.