[Suggestions] Moving suggestions code to a new component

components/suggestions/suggestions_service.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.
 
-#ifndef CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
-#define CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
+#ifndef COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
+#define COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/cancelable_callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/threading/thread_checker.h"
 #include "base/time/time.h"
-#include "chrome/browser/search/suggestions/image_manager.h"
-#include "chrome/browser/search/suggestions/proto/suggestions.pb.h"
 #include "components/keyed_service/core/keyed_service.h"
+#include "components/suggestions/image_manager.h"
+#include "components/suggestions/proto/suggestions.pb.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "ui/gfx/image/image_skia.h"
 #include "url/gurl.h"
 
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }  // namespace user_prefs
 
 namespace suggestions {
 
 class BlacklistStore;
 class SuggestionsStore;
 
 extern const char kSuggestionsFieldTrialName[];
 extern const char kSuggestionsFieldTrialURLParam[];
 extern const char kSuggestionsFieldTrialCommonParamsParam[];
 extern const char kSuggestionsFieldTrialBlacklistPathParam[];
 extern const char kSuggestionsFieldTrialBlacklistUrlParam[];
 extern const char kSuggestionsFieldTrialStateParam[];
 extern const char kSuggestionsFieldTrialControlParam[];
 extern const char kSuggestionsFieldTrialStateEnabled[];
 
 // An interface to fetch server suggestions asynchronously.
 class SuggestionsService : public KeyedService, public net::URLFetcherDelegate {
  public:
   typedef base::Callback<void(const SuggestionsProfile&)> ResponseCallback;
 
-  SuggestionsService(net::URLRequestContextGetter* url_request_context,
-                     scoped_ptr<SuggestionsStore> suggestions_store,
-                     scoped_ptr<ImageManager> thumbnail_manager,
-                     scoped_ptr<BlacklistStore> blacklist_store);
+  SuggestionsService(
+      net::URLRequestContextGetter* url_request_context,
+      scoped_ptr<SuggestionsStore> suggestions_store,
+      scoped_ptr<ImageManager> thumbnail_manager,
+      scoped_ptr<BlacklistStore> blacklist_store,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
   virtual ~SuggestionsService();
 
   // Whether this service is enabled.
   static bool IsEnabled();
 
   // Whether the user is part of a control group.
   static bool IsControlGroup();
 
   // Request suggestions data, which will be passed to |callback|. Initiates a
   // fetch request unless a pending one exists. To prevent multiple requests,
@@ skipping 62 matching lines @@
   // blacklist request for it.
   void UploadOneFromBlacklist();
 
   // Updates |blacklist_delay_sec_| based on the success of the last request.
   void UpdateBlacklistDelay(bool last_request_successful);
 
   // Test seams.
   int blacklist_delay() const { return blacklist_delay_sec_; }
   void set_blacklist_delay(int delay) { blacklist_delay_sec_ = delay; }
 
+  base::ThreadChecker thread_checker_;
+
+  // Task runner on which callback tasks are posted.
+  scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
+
   // The cache for the suggestions.
   scoped_ptr<SuggestionsStore> suggestions_store_;
 
   // The local cache for temporary blacklist, until uploaded to the server.
   scoped_ptr<BlacklistStore> blacklist_store_;
 
   // Contains the current suggestions fetch request. Will only have a value
   // while a request is pending, and will be reset by |OnURLFetchComplete|.
   scoped_ptr<net::URLFetcher> pending_request_;
 
@@ skipping 27 matching lines @@
 
   // Timeout (in ms) before serving requestors after a fetch suggestions request
   // has been issued.
   int request_timeout_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestionsService);
 };
 
 }  // namespace suggestions
 
-#endif  // CHROME_BROWSER_SEARCH_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
+#endif  // COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_