[Remote suggestions] Move the throttler into the Scheduler

components/ntp_snippets/remote/remote_suggestions_fetcher.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_REMOTE_REMOTE_SUGGESTIONS_FETCHER_H_
 #define COMPONENTS_NTP_SNIPPETS_REMOTE_REMOTE_SUGGESTIONS_FETCHER_H_
 
 #include <memory>
 #include <queue>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/optional.h"
 #include "base/time/clock.h"
 #include "base/time/tick_clock.h"
 #include "components/ntp_snippets/category.h"
 #include "components/ntp_snippets/category_info.h"
 #include "components/ntp_snippets/remote/json_request.h"
 #include "components/ntp_snippets/remote/remote_suggestion.h"
 #include "components/ntp_snippets/remote/request_params.h"
-#include "components/ntp_snippets/remote/request_throttler.h"
 #include "components/ntp_snippets/status.h"
 #include "components/translate/core/browser/language_model.h"
 #include "net/url_request/url_request_context_getter.h"
 
 class PrefService;
 class SigninManagerBase;
 
 namespace base {
 class Value;
 }  // namespace base
@@ skipping 120 matching lines @@
                        const std::string& error_details);
   void FetchFinished(OptionalFetchedCategories categories,
                      SnippetsAvailableCallback callback,
                      internal::FetchResult status_code,
                      const std::string& error_details);
 
   bool JsonToSnippets(const base::Value& parsed,
                       FetchedCategoriesVector* categories,
                       const base::Time& fetch_time);
 
-  bool DemandQuotaForRequest(bool interactive_request);
-
   // Authentication for signed-in users.
   SigninManagerBase* signin_manager_;
   OAuth2TokenService* token_service_;
   std::unique_ptr<OAuth2TokenService::Request> oauth_request_;
   bool waiting_for_refresh_token_ = false;
 
   // When a token request gets canceled, we want to retry once.
   bool oauth_token_retried_ = false;
 
   // Holds the URL request context.
@@ skipping 16 matching lines @@
 
   // API key to use for non-authenticated requests.
   const std::string api_key_;
 
   // Allow for an injectable clock for testing.
   std::unique_ptr<base::Clock> clock_;
 
   // Classifier that tells us how active the user is. Not owned.
   const UserClassifier* user_classifier_;
 
-  // Request throttlers for limiting requests for different classes of users.
-  RequestThrottler request_throttler_rare_ntp_user_;
-  RequestThrottler request_throttler_active_ntp_user_;
-  RequestThrottler request_throttler_active_suggestions_consumer_;
-
   // Info on the last finished fetch.
   std::string last_status_;
   std::string last_fetch_json_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteSuggestionsFetcher);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_REMOTE_REMOTE_SUGGESTIONS_FETCHER_H_