[ios] Creates Reading List delete metrics.

Bug: None
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I004609fbdc2ca0a831f363448784254a34c47809
Reviewed-on: https://chromium-review.googlesource.com/1191093Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Gayane Petrosyan <gayane@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587332}

ios/chrome/browser/ui/reading_list/reading_list_table_view_controller.mm

@@ -202,6 +202,7 @@ ReadingListSelectionState GetSelectionStateForSelectedCounts(
     commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
      forRowAtIndexPath:(NSIndexPath*)indexPath {
   DCHECK_EQ(editingStyle, UITableViewCellEditingStyleDelete);
+  base::RecordAction(base::UserMetricsAction("MobileReadingListDeleteEntry"));
   [self deleteItemsAtIndexPaths:@[ indexPath ]];
 }
 
@@ -401,6 +402,8 @@ ReadingListSelectionState GetSelectionStateForSelectedCounts(
 }
 
 - (void)deleteSelectedReadingListItems {
+  base::RecordAction(
+      base::UserMetricsAction("MobileReadingListDeleteSelected"));
   [self deleteItemsAtIndexPaths:self.tableView.indexPathsForSelectedRows];
   [self exitEditingModeAnimated:YES];
 }

tools/metrics/actions/actions.xml

@@ -11439,6 +11439,13 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="MobileReadingListDeleteEntry">
+  <owner>gambard@chromium.org</owner>
+  <description>
+    User deleted a single entry from the ReadingList using swipe to delete.
+  </description>
+</action>
+
 <action name="MobileReadingListDeleteRead">
   <owner>gambard@chromium.org</owner>
   <description>
@@ -11447,6 +11454,13 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="MobileReadingListDeleteSelected">
+  <owner>gambard@chromium.org</owner>
+  <description>
+    User deleted the selected entries from the ReadingList.
+  </description>
+</action>
+
 <action name="MobileReadingListMarkRead">
   <owner>gambard@chromium.org</owner>
   <description>