Add "Read Later" action to ContentSuggestions' context menu

ios/chrome/browser/content_suggestions/content_suggestions_coordinator.mm

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/content_suggestions/content_suggestions_coordinator.h"
 
 #include "base/mac/scoped_nsobject.h"
+#include "base/metrics/user_metrics.h"
+#include "base/metrics/user_metrics_action.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/ntp_snippets/content_suggestions_service.h"
 #include "components/ntp_snippets/remote/remote_suggestions_scheduler.h"
+#include "components/reading_list/core/reading_list_model.h"
 #import "ios/chrome/browser/content_suggestions/content_suggestions_mediator.h"
 #include "ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.h"
+#include "ios/chrome/browser/reading_list/reading_list_model_factory.h"
 #import "ios/chrome/browser/ui/alert_coordinator/action_sheet_coordinator.h"
 #import "ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_article_item.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_commands.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.h"
 #import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestion_identifier.h"
 #import "ios/chrome/browser/ui/url_loader.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/web/public/referrer.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/strings/grit/ui_strings.h"
@@ skipping 105 matching lines @@
   self.alertCoordinator = [[ActionSheetCoordinator alloc]
       initWithBaseViewController:self.navigationController
                            title:nil
                          message:nil
                             rect:CGRectMake(touchLocation.x, touchLocation.y, 0,
                                             0)
                             view:self.suggestionsViewController.collectionView];
 
   __weak ContentSuggestionsCoordinator* weakSelf = self;
   GURL articleURL = articleItem.articleURL;
+  NSString* articleTitle = articleItem.title;
   __weak ContentSuggestionsArticleItem* weakArticle = articleItem;
 
   NSString* openInNewTabTitle =
       l10n_util::GetNSString(IDS_IOS_CONTENT_CONTEXT_OPENLINKNEWTAB);
   [self.alertCoordinator
       addItemWithTitle:openInNewTabTitle
                 action:^{
                   // TODO(crbug.com/691979): Add metrics.
                   [weakSelf openNewTabWithURL:articleURL incognito:NO];
                 }
                  style:UIAlertActionStyleDefault];
 
   NSString* openInNewTabIncognitoTitle =
       l10n_util::GetNSString(IDS_IOS_CONTENT_CONTEXT_OPENLINKNEWINCOGNITOTAB);
   [self.alertCoordinator
       addItemWithTitle:openInNewTabIncognitoTitle
                 action:^{
                   // TODO(crbug.com/691979): Add metrics.
                   [weakSelf openNewTabWithURL:articleURL incognito:YES];
                 }
                  style:UIAlertActionStyleDefault];
 
+  NSString* readLaterTitle =
+      l10n_util::GetNSString(IDS_IOS_CONTENT_CONTEXT_ADDTOREADINGLIST);
+  [self.alertCoordinator
+      addItemWithTitle:readLaterTitle
+                action:^{
+                  ContentSuggestionsCoordinator* strongSelf = weakSelf;
+                  if (!strongSelf)
+                    return;
+
+                  base::RecordAction(
+                      base::UserMetricsAction("MobileReadingListAdd"));
+                  // TODO(crbug.com/691979): Add metrics.
+
+                  ReadingListModel* readingModel =
+                      ReadingListModelFactory::GetForBrowserState(
+                          strongSelf.browserState);
+                  readingModel->AddEntry(articleURL,
+                                         base::SysNSStringToUTF8(articleTitle),
+                                         reading_list::ADDED_VIA_CURRENT_APP);
+                }
+                 style:UIAlertActionStyleDefault];
+
   NSString* deleteTitle =
       l10n_util::GetNSString(IDS_IOS_CONTENT_SUGGESTIONS_DELETE);
   [self.alertCoordinator addItemWithTitle:deleteTitle
                                    action:^{
                                      // TODO(crbug.com/691979): Add metrics.
                                      [weakSelf dismissArticle:weakArticle
                                                   atIndexPath:indexPath];
                                    }
                                     style:UIAlertActionStyleDefault];
 
@@ skipping 30 matching lines @@
   if (!article)
     return;
 
   // TODO(crbug.com/691979): Add metrics.
   [self.contentSuggestionsMediator
       dismissSuggestion:article.suggestionIdentifier];
   [self.suggestionsViewController dismissEntryAtIndexPath:indexPath];
 }
 
 @end