components: Cleanup class/struct fwd declarations

components/omnibox/browser/base_search_provider.h

 // Copyright 2014 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.
 //
 // This class contains common functionality for search-based autocomplete
 // providers. Search provider and zero suggest provider both use it for common
 // functionality.
 
 #ifndef COMPONENTS_OMNIBOX_BROWSER_BASE_SEARCH_PROVIDER_H_
 #define COMPONENTS_OMNIBOX_BROWSER_BASE_SEARCH_PROVIDER_H_
@@ skipping 13 matching lines @@
 #include "components/omnibox/browser/autocomplete_provider.h"
 #include "components/omnibox/browser/search_suggestion_parser.h"
 
 class AutocompleteProviderClient;
 class GURL;
 class SearchTermsData;
 class SuggestionDeletionHandler;
 class TemplateURL;
 
 namespace base {
-class DictionaryValue;
-class ListValue;
 class Value;
 }
 
 // Base functionality for receiving suggestions from a search engine.
 // This class is abstract and should only be used as a base for other
 // autocomplete providers utilizing its functionality.
 class BaseSearchProvider : public AutocompleteProvider {
  public:
   // ID used in creating URLFetcher for default provider's suggest results.
   static const int kDefaultProviderURLFetcherID;
@@ skipping 214 matching lines @@
 
   // Each deletion handler in this vector corresponds to an outstanding request
   // that a server delete a personalized suggestion. Making this a ScopedVector
   // causes us to auto-cancel all such requests on shutdown.
   SuggestionDeletionHandlers deletion_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseSearchProvider);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_BASE_SEARCH_PROVIDER_H_