Move ContentSuggestions identifiers to custom target

ios/chrome/browser/ui/content_suggestions/identifier/content_suggestions_section_information.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/ui/content_suggestions/content_suggestions_section_information.h"
+#import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestions_section_information.h"
 
 #include "base/logging.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @implementation ContentSuggestionsSectionInformation
 
-@synthesize emptyCell = _emptyCell;

[lpromero, 2017/03/20 15:16:01]

This was unused?

[gambard, 2017/03/20 15:35:15]

Yes. I will add a title/subtitle string for the empty cell, it makes more sense
to have the CollectionView choosing the type of cell it wants to display than
passing it the cell.

[lpromero, 2017/03/20 15:42:08]

Definitely. Thanks!

lgtm

 @synthesize layout = _layout;
 @synthesize sectionID = _sectionID;
 @synthesize title = _title;
 @synthesize footerTitle = _footerTitle;
 
 - (instancetype)initWithSectionID:(ContentSuggestionsSectionID)sectionID {
   self = [super init];
   if (self) {
     DCHECK(sectionID < ContentSuggestionsSectionUnknown);
     _sectionID = sectionID;
   }
   return self;
 }
 
 @end