[Sync] Add option to remove device from "Other devices" on desktop

chrome/browser/resources/history/other_devices.js

Index: chrome/browser/resources/history/other_devices.js
diff --git a/chrome/browser/resources/history/other_devices.js b/chrome/browser/resources/history/other_devices.js
index c69f68222b0f43dc5ee21f30ce0f62e34d5f7d39..cc362b499b7c41b2894b75af7c8d7e19d337f172 100644
--- a/chrome/browser/resources/history/other_devices.js
+++ b/chrome/browser/resources/history/other_devices.js
@@ -67,9 +67,10 @@ DeviceContextMenuController.prototype.initialize = function() {
   this.expandItem_ = this.appendMenuItem_('expandSessionMenuItemText');
   this.expandItem_.addEventListener('activate',
                                     this.onCollapseOrExpand_.bind(this));
-  this.openAllItem_ = this.appendMenuItem_('restoreSessionMenuItemText');
-  this.openAllItem_.addEventListener('activate',
-                                     this.onOpenAll_.bind(this));
+  var openAllItem = this.appendMenuItem_('restoreSessionMenuItemText');
+  openAllItem.addEventListener('activate', this.onOpenAll_.bind(this));
+  var deleteItem = this.appendMenuItem_('deleteSessionMenuItemText');
+  deleteItem.addEventListener('activate', this.onDeleteSession_.bind(this));
 };
 
 /**
@@ -127,6 +128,16 @@ DeviceContextMenuController.prototype.onOpenAll_ = function(e) {
 };
 
 /**
+ * Handler for the 'Hide for now' menu item.
+ * @param {Event} e The activation event.
+ * @private
+ */
+DeviceContextMenuController.prototype.onDeleteSession_ = function(e) {
+  chrome.send('deleteForeignSession', [this.session_.tag]);
+  recordUmaEvent_(HISTOGRAM_EVENT.HIDE_FOR_NOW);
+};
+
+/**
  * Set the visibility of the Expand/Collapse menu items based on the state
  * of the session that this menu is currently associated with.
  * @private