[Local NTP] Fix chrome://large-icon fallback when no favicon is found.

components/favicon_base/favicon_types.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_TYPES_H_
 #define COMPONENTS_FAVICON_BASE_FAVICON_TYPES_H_
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/geometry/size.h"
@@ skipping 61 matching lines @@
 };
 
 // Define type with same structure as FaviconRawBitmapResult for passing data to
 // HistoryBackend::SetFavicons().
 typedef FaviconRawBitmapResult FaviconRawBitmapData;
 
 // Result returned by LargeIconService::GetLargeIconOrFallbackStyle(). Contains
 // either the bitmap data if the favicon database has a sufficiently large
 // favicon bitmap and the style of the fallback icon otherwise.
 struct LargeIconResult {
-  LargeIconResult();
+  explicit LargeIconResult(const FaviconRawBitmapResult& bitmap_in);
+
+  // Takes ownership of |fallback_icon_style_in|.
+  explicit LargeIconResult(FallbackIconStyle* fallback_icon_style_in);
+
   ~LargeIconResult();
 
   // The bitmap from the favicon database if the database has a sufficiently
   // large one.
   FaviconRawBitmapResult bitmap;
 
   // The fallback icon style if a sufficiently large icon isn't available. This
   // uses the dominant color of a smaller icon as the background if available.
   scoped_ptr<FallbackIconStyle> fallback_icon_style;
 };
 
 }  // namespace favicon_base
 
 #endif  // COMPONENTS_FAVICON_BASE_FAVICON_TYPES_H_