Make FaviconService::GetRawFaviconForPageURL() select the best candidate among all the icon types

components/history/core/browser/history_service.h

 // Copyright (c) 2012 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_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_
 #define COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 645 matching lines @@
       const std::vector<int>& desired_sizes,
       const favicon_base::FaviconResultsCallback& callback,
       base::CancelableTaskTracker* tracker);
 
   // Used by the FaviconService to get favicons mapped to |page_url| for
   // |icon_types| whose edge sizes most closely match |desired_sizes|. If
   // |desired_sizes| has a '0' entry, the largest favicon bitmap for
   // |icon_types| is returned. The returned FaviconBitmapResults will have at
   // most one result for each entry in |desired_sizes|. If a favicon bitmap is
   // determined to be the best candidate for multiple |desired_sizes| there
-  // will be fewer results. If |icon_types| has several types, results for only
-  // a single type will be returned in the priority of TOUCH_PRECOMPOSED_ICON,
-  // TOUCH_ICON, and FAVICON.
+  // will be fewer results.
   base::CancelableTaskTracker::TaskId GetFaviconsForURL(
       const GURL& page_url,
       int icon_types,
       const std::vector<int>& desired_sizes,
       const favicon_base::FaviconResultsCallback& callback,
       base::CancelableTaskTracker* tracker);
 
   // Used by FaviconService to find the first favicon bitmap whose width and
   // height are greater than that of |minimum_size_in_pixels|. This searches
   // for icons by IconType. Each element of |icon_types| is a bitmask of
@@ skipping 162 matching lines @@
 
   // All vended weak pointers are invalidated in Cleanup().
   base::WeakPtrFactory<HistoryService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_