Componentize safe_browsing: move threat_details* to component.

chrome/browser/safe_browsing/threat_details_history.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.
-
-#ifndef CHROME_BROWSER_SAFE_BROWSING_THREAT_DETAILS_HISTORY_H_
-#define CHROME_BROWSER_SAFE_BROWSING_THREAT_DETAILS_HISTORY_H_
-
-// This class gets redirect chain for urls from the history service.
-
-#include <string>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/containers/hash_tables.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/scoped_observer.h"
-#include "base/sequenced_task_runner_helpers.h"
-#include "base/task/cancelable_task_tracker.h"
-#include "components/history/core/browser/history_service_observer.h"
-#include "content/public/browser/browser_thread.h"
-#include "net/base/completion_callback.h"
-
-namespace safe_browsing {
-
-typedef std::vector<GURL> RedirectChain;
-
-class ThreatDetailsRedirectsCollector
-    : public base::RefCountedThreadSafe<
-          ThreatDetailsRedirectsCollector,
-          content::BrowserThread::DeleteOnUIThread>,
-      public history::HistoryServiceObserver {
- public:
-  explicit ThreatDetailsRedirectsCollector(
-      const base::WeakPtr<history::HistoryService>& history_service);
-
-  // Collects urls' redirects chain information from the history service.
-  // We get access to history service via web_contents in UI thread.
-  // Notice the callback will be posted to the IO thread.
-  void StartHistoryCollection(const std::vector<GURL>& urls,
-                              const base::Closure& callback);
-
-  // Returns whether or not StartCacheCollection has been called.
-  bool HasStarted() const;
-
-  // Returns the redirect urls we get from history service
-  const std::vector<RedirectChain>& GetCollectedUrls() const;
-
-  // history::HistoryServiceObserver
-  void HistoryServiceBeingDeleted(
-      history::HistoryService* history_service) override;
-
- private:
-  friend struct content::BrowserThread::DeleteOnThread<
-      content::BrowserThread::UI>;
-  friend class base::DeleteHelper<ThreatDetailsRedirectsCollector>;
-
-  ~ThreatDetailsRedirectsCollector() override;
-
-  void StartGetRedirects(const std::vector<GURL>& urls);
-  void GetRedirects(const GURL& url);
-  void OnGotQueryRedirectsTo(const GURL& url,
-                             const history::RedirectList* redirect_list);
-
-  // Posts the callback method back to IO thread when redirects collecting
-  // is all done.
-  void AllDone();
-
-  base::CancelableTaskTracker request_tracker_;
-
-  // Method we call when we are done. The caller must be alive for the
-  // whole time, we are modifying its state (see above).
-  base::Closure callback_;
-
-  // Sets to true once StartHistoryCollection is called
-  bool has_started_;
-
-  // The urls we need to get redirects for
-  std::vector<GURL> urls_;
-  // The iterator goes over urls_
-  std::vector<GURL>::iterator urls_it_;
-  // The collected directs from history service
-  std::vector<RedirectChain> redirects_urls_;
-
-  base::WeakPtr<history::HistoryService> history_service_;
-  ScopedObserver<history::HistoryService, history::HistoryServiceObserver>
-      history_service_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(ThreatDetailsRedirectsCollector);
-};
-
-}  // namespace safe_browsing
-
-#endif  // CHROME_BROWSER_SAFE_BROWSING_THREAT_DETAILS_HISTORY_H_