Componentize WebHistoryService

chrome/browser/history/web_history_service.h

Index: chrome/browser/history/web_history_service.h
diff --git a/chrome/browser/history/web_history_service.h b/chrome/browser/history/web_history_service.h
deleted file mode 100644
index e492b0d18ff1964425657e14f0bc7930bfbba2a0..0000000000000000000000000000000000000000
--- a/chrome/browser/history/web_history_service.h
+++ /dev/null
@@ -1,165 +0,0 @@
-// 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_HISTORY_WEB_HISTORY_SERVICE_H_
-#define CHROME_BROWSER_HISTORY_WEB_HISTORY_SERVICE_H_
-
-#include <set>
-
-#include "base/memory/weak_ptr.h"
-#include "chrome/browser/profiles/profile.h"
-#include "components/history/core/browser/history_types.h"
-#include "components/keyed_service/core/keyed_service.h"
-
-namespace base {
-class DictionaryValue;
-}
-
-namespace net {
-class URLFetcher;
-}
-
-namespace history {
-
-// Provides an API for querying Google servers for a signed-in user's
-// synced history visits. It is roughly analogous to HistoryService, and
-// supports a similar API.
-class WebHistoryService : public KeyedService {
- public:
-  // Handles all the work of making an API request. This class encapsulates
-  // the entire state of the request. When an instance is destroyed, all
-  // aspects of the request are cancelled.
-  class Request {
-   public:
-    virtual ~Request();
-
-    // Returns true if the request is "pending" (i.e., it has been started, but
-    // is not yet been complete).
-    virtual bool IsPending() = 0;
-
-    // Returns the response code received from the server, which will only be
-    // valid if the request succeeded.
-    virtual int GetResponseCode() = 0;
-
-    // Returns the contents of the response body received from the server.
-    virtual const std::string& GetResponseBody() = 0;
-
-    virtual void SetPostData(const std::string& post_data) = 0;
-
-    // Tells the request to begin.
-    virtual void Start() = 0;
-
-   protected:
-    Request();
-  };
-
-  // Callback with the result of a call to QueryHistory(). Currently, the
-  // DictionaryValue is just the parsed JSON response from the server.
-  // TODO(dubroy): Extract the DictionaryValue into a structured results object.
-  typedef base::Callback<void(Request*, const base::DictionaryValue*)>
-      QueryWebHistoryCallback;
-
-  typedef base::Callback<void(bool success)> ExpireWebHistoryCallback;
-
-  typedef base::Callback<void(bool success, bool new_enabled_value)>
-      AudioWebHistoryCallback;
-
-  typedef base::Callback<void(Request*, bool success)> CompletionCallback;
-
-  explicit WebHistoryService(Profile* profile);
-  ~WebHistoryService() override;
-
-  // Searches synced history for visits matching |text_query|. The timeframe to
-  // search, along with other options, is specified in |options|. If
-  // |text_query| is empty, all visits in the timeframe will be returned.
-  // This method is the equivalent of HistoryService::QueryHistory.
-  // The caller takes ownership of the returned Request. If it is destroyed, the
-  // request is cancelled.
-  scoped_ptr<Request> QueryHistory(
-      const base::string16& text_query,
-      const QueryOptions& options,
-      const QueryWebHistoryCallback& callback);
-
-  // Removes all visits to specified URLs in specific time ranges.
-  // This is the of equivalent HistoryService::ExpireHistory().
-  void ExpireHistory(const std::vector<ExpireHistoryArgs>& expire_list,
-                     const ExpireWebHistoryCallback& callback);
-
-  // Removes all visits to specified URLs in the given time range.
-  // This is the of equivalent HistoryService::ExpireHistoryBetween().
-  void ExpireHistoryBetween(const std::set<GURL>& restrict_urls,
-                            base::Time begin_time,
-                            base::Time end_time,
-                            const ExpireWebHistoryCallback& callback);
-
-  // Requests whether audio history recording is enabled.
-  virtual void GetAudioHistoryEnabled(const AudioWebHistoryCallback& callback);
-
-  // Sets the state of audio history recording to |new_enabled_value|.
-  virtual void SetAudioHistoryEnabled(bool new_enabled_value,
-                                      const AudioWebHistoryCallback& callback);
-
-  // Used for tests.
-  size_t GetNumberOfPendingAudioHistoryRequests();
-
- protected:
-  // This function is pulled out for testing purposes. Caller takes ownership of
-  // the new Request.
-  virtual Request* CreateRequest(const GURL& url,
-                                 const CompletionCallback& callback);
-
-  // Extracts a JSON-encoded HTTP response into a DictionaryValue.
-  // If |request|'s HTTP response code indicates failure, or if the response
-  // body is not JSON, a null pointer is returned.
-  static scoped_ptr<base::DictionaryValue> ReadResponse(Request* request);
-
-  // Called by |request| when a web history query has completed. Unpacks the
-  // response and calls |callback|, which is the original callback that was
-  // passed to QueryHistory().
-  static void QueryHistoryCompletionCallback(
-      const WebHistoryService::QueryWebHistoryCallback& callback,
-      WebHistoryService::Request* request,
-      bool success);
-
-  // Called by |request| when a request to delete history from the server has
-  // completed. Unpacks the response and calls |callback|, which is the original
-  // callback that was passed to ExpireHistory().
-  void ExpireHistoryCompletionCallback(
-      const WebHistoryService::ExpireWebHistoryCallback& callback,
-      WebHistoryService::Request* request,
-      bool success);
-
-  // Called by |request| when a request to get or set audio history from the
-  // server has completed. Unpacks the response and calls |callback|, which is
-  // the original callback that was passed to AudioHistory().
-  void AudioHistoryCompletionCallback(
-    const WebHistoryService::AudioWebHistoryCallback& callback,
-    WebHistoryService::Request* request,
-    bool success);
-
- private:
-  friend class WebHistoryServiceTest;
-
-  Profile* profile_;
-
-  // Stores the version_info token received from the server in response to
-  // a mutation operation (e.g., deleting history). This is used to ensure that
-  // subsequent reads see a version of the data that includes the mutation.
-  std::string server_version_info_;
-
-  // Pending expiration requests to be canceled if not complete by profile
-  // shutdown.
-  std::set<Request*> pending_expire_requests_;
-
-  // Pending requests to be canceled if not complete by profile shutdown.
-  std::set<Request*> pending_audio_history_requests_;
-
-  base::WeakPtrFactory<WebHistoryService> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebHistoryService);
-};
-
-}  // namespace history
-
-#endif  // CHROME_BROWSER_HISTORY_WEB_HISTORY_SERVICE_H_