Removes the IsReadingListEnabled flags

ios/chrome/browser/ui/activity_services/activity_service_controller.mm

 // Copyright 2014 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/ui/activity_services/activity_service_controller.h"
 
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
-#include "components/reading_list/core/reading_list_switches.h"
 #import "ios/chrome/browser/ui/activity_services/activity_type_util.h"
 #import "ios/chrome/browser/ui/activity_services/appex_constants.h"
 #import "ios/chrome/browser/ui/activity_services/chrome_activity_item_source.h"
 #import "ios/chrome/browser/ui/activity_services/print_activity.h"
 #import "ios/chrome/browser/ui/activity_services/reading_list_activity.h"
 #import "ios/chrome/browser/ui/activity_services/share_protocol.h"
 #import "ios/chrome/browser/ui/activity_services/share_to_data.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ skipping 189 matching lines @@
 }
 
 - (NSArray*)applicationActivitiesForData:(ShareToData*)data
                               controller:(UIViewController*)controller {
   NSMutableArray* applicationActivities = [NSMutableArray array];
   if (data.isPagePrintable) {
     PrintActivity* printActivity = [[PrintActivity alloc] init];
     [printActivity setResponder:controller];
     [applicationActivities addObject:printActivity];
   }
-  if (reading_list::switches::IsReadingListEnabled() &&
-      data.url.SchemeIsHTTPOrHTTPS()) {
+  if (data.url.SchemeIsHTTPOrHTTPS()) {
     ReadingListActivity* readingListActivity =
         [[ReadingListActivity alloc] initWithURL:data.url
                                            title:data.title
                                        responder:controller];
     [applicationActivities addObject:readingListActivity];
   }
   return applicationActivities;
 }
 
 - (BOOL)processItemsReturnedFromActivity:(NSString*)activityType
@@ skipping 58 matching lines @@
   return NO;
 }
 
 #pragma mark - For Testing
 
 - (void)setShareToDelegateForTesting:(id<ShareToDelegate>)delegate {
   shareToDelegate_ = delegate;
 }
 
 @end