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..09561748f78937a26792e6fd1a3dc15c3f5cf721 100644
--- a/chrome/browser/resources/md_history/history.js
+++ b/chrome/browser/resources/md_history/history.js
@@ -17,15 +17,6 @@ window.addEventListener('load', function() {
 });
 
 /**
- * Our history system calls this function with results from searches.
- * @param {HistoryQuery} info An object containing information about the query.
- * @param {Array<HistoryEntry>} results A list of results.
- */
-function historyResult(info, results) {
-  $('history-card-manager').addNewResults(results);
-}
-
-/**
  * Listens for history-item being selected or deselected (through checkbox)
  * and changes the view of the top toolbar.
  */
@@ -43,6 +34,23 @@ window.addEventListener('unselect-all', function() {
 });
 
 /**
+ * Listens for call to delete all selected items and loops through all items to
+ * to determine which ones 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').getItemsToDelete(

[calamity, 2016/02/02 05:34:58]

nit: wrap after the = instead.

[hsampson, 2016/02/02 22:59:53]

Done.

+      $('toolbar').count);
+  chrome.send('removeVisits', toBeRemoved);
+});
+
+/**
  * Listens for any keyboard presses which will close the overflow menu.
  */
 window.addEventListener('keydown', function(e) {
@@ -58,3 +66,34 @@ window.addEventListener('keydown', function(e) {
 window.addEventListener('resize', function() {
   $('history-card-manager').closeMenu();
 });
+
+// Chrome Callbacks-------------------------------------------------------------
+
+/**
+ * Our history system calls this function with results from searches.
+ * @param {HistoryQuery} info An object containing information about the query.
+ * @param {Array<HistoryEntry>} results A list of results.
+ */
+function historyResult(info, results) {
+  $('history-card-manager').addNewResults(results);
+}
+
+/**
+ * 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() {
+}
+
+/**
+ * Called when the history is deleted by someone else.
+ */
+function historyDeleted() {
+}