Fix include guards of files in src/ios.

ios/chrome/browser/share_extension/share_extension_item_receiver.h

 // 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.
 
-#ifndef IOS_CHROME_BROWSER_UI_SHARE_EXTENSION_SHARE_EXTENSION_ITEM_RECEIVER_H_
-#define IOS_CHROME_BROWSER_UI_SHARE_EXTENSION_SHARE_EXTENSION_ITEM_RECEIVER_H_
+#ifndef IOS_CHROME_BROWSER_SHARE_EXTENSION_SHARE_EXTENSION_ITEM_RECEIVER_H_
+#define IOS_CHROME_BROWSER_SHARE_EXTENSION_SHARE_EXTENSION_ITEM_RECEIVER_H_
 
 #import <Foundation/Foundation.h>
 
 namespace bookmarks {
 class BookmarkModel;
 }
 
 class ReadingListModel;
 
 // This class observes the Application group folder
 // |app_group::ShareExtensionItemsFolder()| and process the files it contains
 // when a new file is created or when application is put in foreground.
 @interface ShareExtensionItemReceiver : NSObject
 
 + (instancetype)sharedInstance;
 
 // Sets the bookmark and reading list models to use. |shutdown| must be called
 // before other models are set.
 // The receiver will start observe the share extension folder and send items to
 // these models.
 - (void)setBookmarkModel:(bookmarks::BookmarkModel*)bookmarkModel
         readingListModel:(ReadingListModel*)readingListModel;
 
 // Stops observers and pending operations.
 - (void)shutdown;
 
 @end
 
-#endif  // IOS_CHROME_BROWSER_UI_SHARE_EXTENSION_SHARE_EXTENSION_ITEM_RECEIVER_H_
+#endif  // IOS_CHROME_BROWSER_SHARE_EXTENSION_SHARE_EXTENSION_ITEM_RECEIVER_H_