Move ContentSuggestions identifiers to custom target

ios/chrome/browser/ui/content_suggestions/identifier/content_suggestion_identifier.h

 // 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.
 
-#ifndef IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTION_IDENTIFIER_H_
-#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTION_IDENTIFIER_H_
+#ifndef IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_IDENTIFIER_CONTENT_SUGGESTION_IDENTIFIER_H_
+#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_IDENTIFIER_CONTENT_SUGGESTION_IDENTIFIER_H_
 
 #import <Foundation/Foundation.h>
 
 #include <string>
 
 @class ContentSuggestionsSectionInformation;
 
 // An class identifying a suggestion.
 @interface ContentSuggestionIdentifier : NSObject
 
 @property(nonatomic, strong) ContentSuggestionsSectionInformation* sectionInfo;
 // Must be unique inside a section.
 @property(nonatomic, assign) std::string IDInSection;
 
 @end
 
 // A protocol for an object having an ID.
 @protocol ContentSuggestionIdentification
 
 @property(nonatomic, strong) ContentSuggestionIdentifier* suggestionIdentifier;
 
 @end
 
-#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTION_IDENTIFIER_H_
+#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_IDENTIFIER_CONTENT_SUGGESTION_IDENTIFIER_H_