Extend FaviconService to support fetching favicons from a Google server

components/favicon_base/favicon_util.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_FAVICON_UTIL_H_
 #define COMPONENTS_FAVICON_BASE_FAVICON_UTIL_H_
 
 #include <vector>
 
 #include "components/favicon_base/favicon_types.h"
@@ skipping 27 matching lines @@
 
 // Generates a favicon_bitmap_result sized exactly to [desired_size,
 // desired_size] from the provided result set.  If the exact size is found in
 // the set, it just returns that; otherwise, it will decode the PNG, scale,
 // and encode a new PNG.
 favicon_base::FaviconRawBitmapResult ResizeFaviconBitmapResult(
     const std::vector<favicon_base::FaviconRawBitmapResult>&
         favicon_bitmap_results,
     int desired_size_in_pixel);
 
-}  // namspace favicon_base
+// Returns a resampled bitmap of |desired_size|x|desired_size| by resampling the
+// best bitmap out of |input_bitmaps|. ResizeBitmapByDownsamplingIfPossible() is
+// similar to SelectFaviconFrames() but it operates on bitmaps which have
+// already been resampled via SelectFaviconFrames().
+SkBitmap ResizeBitmapByDownsamplingIfPossible(
+    const std::vector<SkBitmap>& input_bitmaps,
+    int desired_size);
+
+}  // namespace favicon_base
 
 #endif  // COMPONENTS_FAVICON_BASE_FAVICON_UTIL_H_