[ObjC ARC] Converts ios/chrome/browser/reading_list:reading_list to ARC.Automatically generated A…

ios/chrome/browser/reading_list/reading_list_web_state_observer.mm

 // Copyright 2016 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.
 
 #include "ios/chrome/browser/reading_list/reading_list_web_state_observer.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/memory/ptr_util.h"
 #include "components/reading_list/ios/reading_list_model.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/reading_list/reading_list_entry_loading_util.h"
 #include "ios/chrome/browser/reading_list/reading_list_model_factory.h"
 #include "ios/web/public/navigation_item.h"
 #include "ios/web/public/navigation_manager.h"
 #include "ios/web/public/web_state/web_state_user_data.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 #pragma mark - ReadingListWebStateObserverUserDataWrapper
 
 namespace {
 // The key under which ReadingListWebStateObserverUserDataWrapper are stored in
 // a WebState's user data.
 const void* const kObserverKey = &kObserverKey;
 }  // namespace
 
 // Wrapper class used to associated ReadingListWebStateObserver with their
 // WebStates.
@@ skipping 87 matching lines @@
   double progress = web_state()->GetLoadingProgress();
   const double kMinimumExpectedProgress = 0.15;
   if (progress < kMinimumExpectedProgress) {
     const ReadingListEntry* entry = reading_list_model_->GetEntryByURL(url);
     if (!entry)
       return;
     reading_list::LoadReadingListDistilled(*entry, reading_list_model_,
                                            web_state());
   }
 }