Change the ntp_snippet_service to use a gfx image instead of SkBitmap.

components/ntp_snippets/ntp_snippets_service.cc

 // Copyright 2015 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/ntp_snippets/ntp_snippets_service.h"
 
 #include <algorithm>
 #include <iterator>
 #include <utility>
 
@@ skipping 131 matching lines @@
   return std::find_if(haystack.begin(), haystack.end(),
                       [&id](const std::unique_ptr<NTPSnippet>& snippet) {
                         return snippet->id() == id;
                       }) != haystack.end();
 }
 
 void WrapImageFetchedCallback(
     const NTPSnippetsService::ImageFetchedCallback& callback,
     const GURL& snippet_id_url,
     const gfx::Image& image) {
-  const SkBitmap* bitmap = nullptr;
-  if (!image.IsEmpty())
-    bitmap = image.ToSkBitmap();
-  callback.Run(snippet_id_url.spec(), bitmap);
+  callback.Run(snippet_id_url.spec(), image);
 }
 
 }  // namespace
 
 NTPSnippetsService::NTPSnippetsService(
     PrefService* pref_service,
     SuggestionsService* suggestions_service,
     scoped_refptr<base::SequencedTaskRunner> file_task_runner,
     const std::string& application_language_code,
     NTPSnippetsScheduler* scheduler,
@@ skipping 75 matching lines @@
 
 void NTPSnippetsService::FetchSnippetImage(
     const std::string& snippet_id,
     const ImageFetchedCallback& callback) {
   auto it =
       std::find_if(snippets_.begin(), snippets_.end(),
                    [&snippet_id](const std::unique_ptr<NTPSnippet>& snippet) {
                      return snippet->id() == snippet_id;
                    });
   if (it == snippets_.end()) {
-    callback.Run(snippet_id, nullptr);
+    gfx::Image empty_image;
+    callback.Run(snippet_id, empty_image);
     return;
   }
 
   const NTPSnippet& snippet = *it->get();
   // TODO(treib): Make ImageFetcher take a string instead of a GURL as an
   // identifier.
   image_fetcher_->StartOrQueueNetworkRequest(
       GURL(snippet.id()), snippet.salient_image_url(),
       base::Bind(WrapImageFetchedCallback, callback));
   // TODO(treib): Cache/persist the snippet image.
@@ skipping 240 matching lines @@
     if (snippet->expiry_date() < next_expiry)
       next_expiry = snippet->expiry_date();
   }
   DCHECK_GT(next_expiry, expiry);
   expiry_timer_.Start(FROM_HERE, next_expiry - expiry,
                       base::Bind(&NTPSnippetsService::LoadingSnippetsFinished,
                                  base::Unretained(this)));
 }
 
 }  // namespace ntp_snippets