Stop sharing BaseSearchProvider::OnURLFetchComplete between 2 providers

chrome/browser/autocomplete/zero_suggest_provider.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.
 //
 // This file contains the zero-suggest autocomplete provider. This experimental
 // provider is invoked when the user focuses in the omnibox prior to editing,
 // and generates search query suggestions based on the current URL. To enable
 // this provider, point --experimental-zero-suggest-url-prefix at an
 // appropriate suggestion service.
 //
 // HUGE DISCLAIMER: This is just here for experimenting and will probably be
 // deleted entirely as we revise how suggestions work with the omnibox.
 
 #ifndef CHROME_BROWSER_AUTOCOMPLETE_ZERO_SUGGEST_PROVIDER_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_ZERO_SUGGEST_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/autocomplete/base_search_provider.h"
 #include "chrome/browser/autocomplete/search_provider.h"
 #include "chrome/browser/history/history_types.h"
 #include "components/metrics/proto/omnibox_event.pb.h"
+#include "net/url_request/url_fetcher_delegate.h"
 
+class AutocompleteProviderListener;
 class TemplateURLService;
 
 namespace base {
 class ListValue;
 class Value;
 }
 
 namespace net {
 class URLFetcher;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 // Autocomplete provider for searches based on the current URL.
 //
 // The controller will call StartZeroSuggest when the user focuses in the
 // omnibox. After construction, the autocomplete controller repeatedly calls
 // Start() with some user input, each time expecting to receive an updated
 // set of matches.
 //
 // TODO(jered): Consider deleting this class and building this functionality
 // into SearchProvider after dogfood and after we break the association between
 // omnibox text and suggestions.
-class ZeroSuggestProvider : public BaseSearchProvider {
+class ZeroSuggestProvider : public BaseSearchProvider,
+                            public net::URLFetcherDelegate {
  public:
   // Creates and returns an instance of this provider.
   static ZeroSuggestProvider* Create(AutocompleteProviderListener* listener,
                                      TemplateURLService* template_url_service,
                                      Profile* profile);
 
   // Registers a preference used to cache zero suggest results.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // AutocompleteProvider:
@@ skipping 10 matching lines @@
       metrics::OmniboxEventProto_ProviderInfo* provider_info) const OVERRIDE;
 
  private:
   ZeroSuggestProvider(AutocompleteProviderListener* listener,
                       TemplateURLService* template_url_service,
                       Profile* profile);
 
   virtual ~ZeroSuggestProvider();
 
   // BaseSearchProvider:
-  virtual bool StoreSuggestionResponse(const std::string& json_data,
-                                       const base::Value& parsed_data) OVERRIDE;
   virtual const TemplateURL* GetTemplateURL(bool is_keyword) const OVERRIDE;
   virtual const AutocompleteInput GetInput(bool is_keyword) const OVERRIDE;
-  virtual SearchSuggestionParser::Results* GetResultsToFill(
-      bool is_keyword) OVERRIDE;
   virtual bool ShouldAppendExtraParams(
       const SearchSuggestionParser::SuggestResult& result) const OVERRIDE;
   virtual void StopSuggest() OVERRIDE;
   virtual void ClearAllResults() OVERRIDE;
-  virtual int GetDefaultResultRelevance() const OVERRIDE;
   virtual void RecordDeletionResult(bool success) OVERRIDE;
-  virtual void LogFetchComplete(bool success, bool is_keyword) OVERRIDE;
-  virtual bool IsKeywordFetcher(const net::URLFetcher* fetcher) const OVERRIDE;
-  virtual void UpdateMatches() OVERRIDE;
+
+  // net::URLFetcherDelegate:
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+  // Optionally, cache the received |json_data| and return true if we want
+  // to stop processing results at this point. The |parsed_data| is the parsed
+  // version of |json_data| used to determine if we received an empty result.
+  bool StoreSuggestionResponse(const std::string& json_data,
+                               const base::Value& parsed_data);
 
   // Adds AutocompleteMatches for each of the suggestions in |results| to
   // |map|.
   void AddSuggestResultsToMap(
       const SearchSuggestionParser::SuggestResults& results,
       MatchMap* map);
 
   // Returns an AutocompleteMatch for a navigational suggestion |navigation|.
   AutocompleteMatch NavigationToMatch(
       const SearchSuggestionParser::NavigationResult& navigation);
@@ skipping 21 matching lines @@
 
   // Whether we can show zero suggest on |current_page_url| without
   // sending |current_page_url| as a parameter to the server at |suggest_url|.
   bool CanShowZeroSuggestWithoutSendingURL(const GURL& suggest_url,
                                            const GURL& current_page_url) const;
 
   // Checks whether we have a set of zero suggest results cached, and if so
   // populates |matches_| with cached results.
   void MaybeUseCachedSuggestions();
 
+  AutocompleteProviderListener* listener_;
+
   // The URL for which a suggestion fetch is pending.
   std::string current_query_;
 
   // The type of page the user is viewing (a search results page doing search
   // term replacement, an arbitrary URL, etc.).
   metrics::OmniboxEventProto::PageClassification current_page_classification_;
 
   // Copy of OmniboxEditModel::permanent_text_.
   base::string16 permanent_text_;
 
@@ skipping 12 matching lines @@
 
   history::MostVisitedURLList most_visited_urls_;
 
   // For callbacks that may be run after destruction.
   base::WeakPtrFactory<ZeroSuggestProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ZeroSuggestProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_ZERO_SUGGEST_PROVIDER_H_