components: Cleanup class/struct fwd declarations

components/ntp_snippets/bookmarks/bookmark_suggestions_provider.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 COMPONENTS_NTP_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "components/bookmarks/browser/bookmark_model_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/ntp_snippets/category.h"
 #include "components/ntp_snippets/category_status.h"
 #include "components/ntp_snippets/content_suggestions_provider.h"
 
 class PrefRegistrySimple;
 class PrefService;
 
-namespace gfx {
-class Image;
-}  // namespace gfx
-
 namespace ntp_snippets {
 
 // Provides content suggestions from the bookmarks model.
 class BookmarkSuggestionsProvider : public ContentSuggestionsProvider,
                                     public bookmarks::BookmarkModelObserver {
  public:
   BookmarkSuggestionsProvider(ContentSuggestionsProvider::Observer* observer,
                               CategoryFactory* category_factory,
                               bookmarks::BookmarkModel* bookmark_model,
                               PrefService* pref_service);
@@ skipping 88 matching lines @@
   // deciding which bookmarks to suggest. Should we also consider visits on
   // desktop platforms?
   bool consider_bookmark_visits_from_desktop_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_