Hooking the discovery API to the NTP.

chrome/browser/extensions/api/discovery/suggested_links_registry.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_DISCOVERY_SUGGESTED_LINKS_REGISTRY_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DISCOVERY_SUGGESTED_LINKS_REGISTRY_H_
 #pragma once
 
 #include <map>
 
@@ skipping 10 matching lines @@
   // A list of ExtensionSuggestedLink's.
   typedef std::vector<linked_ptr<extensions::SuggestedLink> > SuggestedLinkList;
 
   SuggestedLinksRegistry();
 
   // Adds a suggested link from |extension_id|. Takes ownership of |item| in all
   // cases.
   void Add(const std::string& extension_id,
       scoped_ptr<extensions::SuggestedLink> item);
 
+  // Returns all the extension ids that have at least one suggestion.
+  scoped_ptr<std::vector<std::string> > GetExtensionIds() const;
+
   // Returns all the links suggested by |extension_id|.
   const SuggestedLinkList* GetAll(const std::string& extension_id) const;
 
   // Remove a specific link suggested by |extension_id|.
   void Remove(const std::string& extension_id, const std::string& link_url);
 
   // Clears all suggested links for |extension_id|.
   void ClearAll(const std::string& extension_id);
 
  private:
@@ skipping 10 matching lines @@
   // An empty list of suggestions that can be returned for non-existing
   // extensions.
   SuggestedLinkList empty_list_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestedLinksRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DISCOVERY_SUGGESTED_LINKS_REGISTRY_H_