Always select best favicon bitmap

components/favicon_base/select_favicon_frames.h

 // Copyright 2014 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_BASE_SELECT_FAVICON_FRAMES_H_
 #define COMPONENTS_FAVICON_BASE_SELECT_FAVICON_FRAMES_H_
 
 #include <stddef.h>
 
 #include <vector>
@@ skipping 43 matching lines @@
 // matches, and gets worse the more resampling needs to happen.
 // TODO(pkotwicz): Change API so that |desired_sizes| being empty indicates
 // that the index of the largest size is requested.
 // TODO(pkotwicz): Remove callers of this method for which |frame_pixel_sizes|
 // are the sizes of the favicon bitmaps after they were resized.
 void SelectFaviconFrameIndices(const std::vector<gfx::Size>& frame_pixel_sizes,
                                const std::vector<int>& desired_sizes,
                                std::vector<size_t>* best_indices,
                                float* score);
 
+// Returns an arbitrary, implementation specific score between [0..1] that is
+// higher for better matches, and 1.0f for exact matches. Order of preference:
+// 1) Non-huge bitmaps are preferred over huge ones (8x bigger than
+//    desired_size).
+// 2) Bitmaps which need to be scaled down instead of up.
+// 3) Bitmaps which do not need to be scaled as much.
+float GetFaviconCandidateScore(const gfx::Size& candidate_size,
+                               int desired_size);
+
 #endif  // COMPONENTS_FAVICON_BASE_SELECT_FAVICON_FRAMES_H_