[MD Bookmarks] Deselect items when clicking outside the bookmark card.

chrome/browser/resources/md_bookmarks/list.js

Index: chrome/browser/resources/md_bookmarks/list.js
diff --git a/chrome/browser/resources/md_bookmarks/list.js b/chrome/browser/resources/md_bookmarks/list.js
index 0edfcbbc4ccf63afd8e4dc4a61ca7153185ec045..19e475d0e9456f766b3aa99b219b226fa16346d2 100644
--- a/chrome/browser/resources/md_bookmarks/list.js
+++ b/chrome/browser/resources/md_bookmarks/list.js
@@ -28,6 +28,7 @@ Polymer({
   },
 
   listeners: {
+    'click': 'deselectItems_',
     'open-item-menu': 'onOpenItemMenu_',
   },
 
@@ -105,4 +106,9 @@ Polymer({
   isEmptyList_: function() {
     return this.displayedList_.length == 0;
   },
+
+  /** @private */
+  deselectItems_: function() {
+    this.dispatch(bookmarks.actions.deselectItems());
+  },
 });