[MD Bookmarks] Add keyboard navigation and selection to bookmark list.

third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js

Index: third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js b/third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js
index c9e0a9fd5330f9f791ccf274c40de7197965a2e5..5d04e7e9db8cfa09d4b94bf156b373757d0179b3 100644
--- a/third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js
@@ -1466,7 +1466,7 @@
       return this._physicalIndexForKey[this._collection.getKey(this._getNormalizedItem(idx))];
     },
 
-    _focusPhysicalItem: function(idx) {
+    focusPhysicalItem: function(idx) {
       if (idx < 0 || idx >= this._virtualCount) {
         return;
       }
@@ -1592,19 +1592,27 @@
     },
 
     _didMoveUp: function() {
-      this._focusPhysicalItem(this._focusedIndex - 1);
+      this.focusPhysicalItem(this._focusedIndex - 1);
     },
 
     _didMoveDown: function(e) {
       // disable scroll when pressing the down key
       e.detail.keyboardEvent.preventDefault();
-      this._focusPhysicalItem(this._focusedIndex + 1);
+      this.focusPhysicalItem(this._focusedIndex + 1);
     },
 
     _didEnter: function(e) {
-      this._focusPhysicalItem(this._focusedIndex);
+      this.focusPhysicalItem(this._focusedIndex);
       this._selectionHandler(e.detail.keyboardEvent);
-    }
+    },
+
+    getFocusedIndex: function() {
+      return this._focusedIndex;
+    },
+
+    getFocusedItem: function() {
+      return this._focusedItem;
+    },
   });
 
-})();
+})();