Remove snippet_id from ImageFetchedCallback

components/ntp_snippets/content_suggestions_provider.h

 // Copyright 2016 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_NTP_SNIPPETS_CONTENT_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_PROVIDER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 10 matching lines @@
 namespace ntp_snippets {
 
 // Provides content suggestions from one particular source.
 // A provider can provide suggestions for multiple ContentSuggestionCategories,
 // but for every category that it provides, it will be the only provider in the
 // system which provides suggestions for that category.
 // Providers are created by the ContentSuggestionsServiceFactory and owned and
 // shut down by the ContentSuggestionsService.
 class ContentSuggestionsProvider {
  public:
-  using ImageFetchedCallback =
-      base::Callback<void(const std::string& suggestion_id, const gfx::Image&)>;
+  using ImageFetchedCallback = base::Callback<void(const gfx::Image&)>;
   using DismissedSuggestionsCallback = base::Callback<void(
       std::vector<ContentSuggestion> dismissed_suggestions)>;
 
   // The observer of a provider is notified when new data is available.
   class Observer {
    public:
     // Called when the available content changed.
     // If a provider provides suggestions for multiple categories, this callback
     // is called once per category. The |suggestions| parameter always contains
     // the full list of currently available suggestions for that category, i.e.,
@@ skipping 100 matching lines @@
   CategoryFactory* category_factory() const { return category_factory_; }
 
  private:
   Observer* observer_;
   CategoryFactory* category_factory_;
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_PROVIDER_H_