Support server-provided category names.

components/ntp_snippets/ntp_snippet.h

 // 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.
 
 #ifndef COMPONENTS_NTP_SNIPPETS_NTP_SNIPPET_H_
 #define COMPONENTS_NTP_SNIPPETS_NTP_SNIPPET_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 18 matching lines @@
                 const GURL& amp_url)
       : url(url), publisher_name(publisher_name), amp_url(amp_url) {}
   GURL url;
   std::string publisher_name;
   GURL amp_url;
 };
 
 class NTPSnippet {
  public:
   using PtrVector = std::vector<std::unique_ptr<NTPSnippet>>;
-  using CategoryMap = std::map<Category, PtrVector, Category::CompareByID>;
 
   // Creates a new snippet with the given |id|.
   // Public for testing only - create snippets using the Create* methods below.
   // TODO(treib): Make this private and add a CreateSnippetForTest?
   NTPSnippet(const std::string& id);
 
   ~NTPSnippet();
 
   // Creates an NTPSnippet from a dictionary, as returned by Chrome Reader.
   // Returns a null pointer if the dictionary doesn't correspond to a valid
@@ skipping 97 matching lines @@
   size_t best_source_index_;
 
   std::vector<SnippetSource> sources_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippet);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPET_H_