MD History: Delete button in the toolbar allows deletion of multiple history-items.

chrome/browser/resources/md_history/history.js

Index: chrome/browser/resources/md_history/history.js
diff --git a/chrome/browser/resources/md_history/history.js b/chrome/browser/resources/md_history/history.js
index ceb5dab5be840a6da95a6a160fabe69ed0dc6523..aae6611f603d4051d6f697f71a8901b9bc62a611 100644
--- a/chrome/browser/resources/md_history/history.js
+++ b/chrome/browser/resources/md_history/history.js
@@ -43,6 +43,23 @@ window.addEventListener('unselect-all', function() {
 });
 
 /**
+ * Listens for call to delete all selected items and loops through all items to
+ * to determine which one are selected and deletes these.
+ */
+window.addEventListener('delete-selected', function() {
+  if (!loadTimeData.getBoolean('allowDeletingHistory')) {
+    return;
+  }
+
+  // TODO(hsampson): add a popup to check whether the user definitely wants to
+  // delete the selected items.
+
+  var toBeRemoved = $('history-card-manager').listOfItemsToDelete(
+      $('toolbar').count);
+  chrome.send('removeVisits', toBeRemoved);
+});
+
+/**
  * Listens for any keyboard presses which will close the overflow menu.
  */
 window.addEventListener('keydown', function(e) {
@@ -58,3 +75,26 @@ window.addEventListener('keydown', function(e) {
 window.addEventListener('resize', function() {
   $('history-card-manager').closeMenu();
 });
+
+// Chrome Callbacks-------------------------------------------------------------
+
+/**
+ * Called by the history backend when deletion was succesful.
+ */
+function deleteComplete() {
+  $('history-card-manager').removeDeletedHistory($('toolbar').count);
+  $('toolbar').count = 0;
+}
+
+/**
+ * Called by the history backend when the deletion failed.
+ */
+function deleteFailed() {
+  window.console.log('Delete failed');
+}
+
+/**
+ * Called when the history is deleted by someone else.
+ */
+function historyDeleted() {
+}