components: Cleanup class/struct fwd declarations

components/ntp_snippets/physical_web_pages/physical_web_page_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_PHYSICAL_WEB_PAGES_PHYSICAL_WEB_PAGE_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_PHYSICAL_WEB_PAGES_PHYSICAL_WEB_PAGE_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "components/ntp_snippets/category.h"
 #include "components/ntp_snippets/category_factory.h"
 #include "components/ntp_snippets/category_status.h"
 #include "components/ntp_snippets/content_suggestion.h"
 #include "components/ntp_snippets/content_suggestions_provider.h"
 
-namespace gfx {
-class Image;
-}  // namespace gfx
-
 namespace ntp_snippets {
 
 // TODO(vitaliii): remove when Physical Web C++ interface is provided.
 struct UrlInfo {
   UrlInfo();
   UrlInfo(const UrlInfo& other);
   ~UrlInfo();
   base::Time scan_time;
   GURL site_url;
   std::string title;
@@ skipping 34 matching lines @@
 
   CategoryStatus category_status_;
   const Category provided_category_;
 
   DISALLOW_COPY_AND_ASSIGN(PhysicalWebPageSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_PHYSICAL_WEB_PAGES_PHYSICAL_WEB_PAGE_SUGGESTIONS_PROVIDER_H_