Split FaviconService and FaviconServiceImpl.

components/favicon/core/large_icon_service.h

 // Copyright 2015 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_FAVICON_CORE_LARGE_ICON_SERVICE_H_
 #define COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 32 matching lines @@
   // For cases 2 and 3, this function returns the style of the fallback icon
   // instead of rendering an icon so clients can render the icon themselves.
   base::CancelableTaskTracker::TaskId GetLargeIconOrFallbackStyle(
     const GURL& page_url,
     int min_source_size_in_pixel,
     int desired_size_in_pixel,
     const favicon_base::LargeIconCallback& callback,
     base::CancelableTaskTracker* tracker);
 
  private:
-  // For testing.
-  friend class TestLargeIconService;
-
   FaviconService* favicon_service_;
   scoped_refptr<base::TaskRunner> background_task_runner_;
 
   // A pre-populated list of icon types to consider when looking for large
   // icons. This is an optimization over populating an icon type vector on each
   // request.
   std::vector<int> large_icon_types_;
 
   DISALLOW_COPY_AND_ASSIGN(LargeIconService);
 };
 
 }  // namespace favicon
 
 #endif  // COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_