[Icons NTP] FaviconService: Add method to retrieve large icon.

components/favicon/core/browser/favicon_service.cc

 // 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.
 
 #include "components/favicon/core/browser/favicon_service.h"
 
 #include <cmath>
 
 #include "base/hash.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 182 matching lines @@
     base::CancelableTaskTracker* tracker) {
   return GetFaviconForPageURLImpl(
       page_url,
       icon_types,
       GetPixelSizesForFaviconScales(desired_size_in_dip),
       callback,
       tracker);
 }
 
 base::CancelableTaskTracker::TaskId
+FaviconService::GetGenericLargeIconForPageURL(
+    const GURL& page_url,
+    int desired_size_in_pixel,
+    const favicon_base::FaviconRawBitmapCallback& callback,
+    base::CancelableTaskTracker* tracker) {
+  favicon_base::FaviconResultsCallback favicon_results_callback =
+      Bind(&FaviconService::RunFaviconRawBitmapCallbackWithBitmapResults,
+           base::Unretained(this),
+           callback,
+           desired_size_in_pixel);
+  if (history_service_) {
+    int icon_types =
+        favicon_base::TOUCH_ICON | favicon_base::TOUCH_PRECOMPOSED_ICON;
+    std::vector<int> desired_sizes_in_pixel;
+    desired_sizes_in_pixel.push_back(desired_size_in_pixel);
+    return history_service_->GetFaviconsForURL(page_url,
+                                               icon_types,
+                                               desired_sizes_in_pixel,
+                                               favicon_results_callback,
+                                               tracker);
+  }
+  return RunWithEmptyResultAsync(favicon_results_callback, tracker);
+}
+
+base::CancelableTaskTracker::TaskId
 FaviconService::UpdateFaviconMappingsAndFetch(
     const GURL& page_url,
     const std::vector<GURL>& icon_urls,
     int icon_types,
     int desired_size_in_dip,
     const favicon_base::FaviconResultsCallback& callback,
     base::CancelableTaskTracker* tracker) {
   if (history_service_) {
     return history_service_->UpdateFaviconMappingsAndFetch(
         page_url,
@@ skipping 169 matching lines @@
   if (!gfx::PNGCodec::EncodeBGRASkBitmap(resized_image.AsBitmap(), false,
                                          &resized_bitmap_data)) {
     callback.Run(favicon_base::FaviconRawBitmapResult());
     return;
   }
 
   bitmap_result.bitmap_data = base::RefCountedBytes::TakeVector(
       &resized_bitmap_data);
   callback.Run(bitmap_result);
 }