Move web_request directory to //extensions.

chrome/browser/extensions/api/web_request/web_request_time_tracker.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_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_TIME_TRACKER_H_
-#define CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_TIME_TRACKER_H_
-
-#include <map>
-#include <queue>
-#include <set>
-#include <string>
-
-#include "base/gtest_prod_util.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "url/gurl.h"
-
-namespace base {
-class Time;
-}
-
-class ExtensionWebRequestTimeTrackerDelegate {
- public:
-  virtual ~ExtensionWebRequestTimeTrackerDelegate() {}
-
-  // Notifies the delegate that |num_delayed_messages| of the last
-  // |total_num_messages| inspected messages were excessively/moderately
-  // delayed. Every excessively delayed message is also counted as a moderately
-  // delayed message.
-  virtual void NotifyExcessiveDelays(
-      void* profile,
-      size_t num_delayed_messages,
-      size_t total_num_messages,
-      const std::set<std::string>& extension_ids) = 0;
-  virtual void NotifyModerateDelays(
-      void* profile,
-      size_t num_delayed_messages,
-      size_t total_num_messages,
-      const std::set<std::string>& extension_ids) = 0;
-};
-
-// This class keeps monitors how much delay extensions add to network requests
-// by using the webRequest API. If the delay is sufficient, we will warn the
-// user that extensions are slowing down the browser.
-class ExtensionWebRequestTimeTracker {
- public:
-  ExtensionWebRequestTimeTracker();
-  ~ExtensionWebRequestTimeTracker();
-
-  // Records the time that a request was created.
-  void LogRequestStartTime(int64 request_id, const base::Time& start_time,
-                           const GURL& url, void* profile);
-
-  // Records the time that a request either completed or encountered an error.
-  void LogRequestEndTime(int64 request_id, const base::Time& end_time);
-
-  // Records an additional delay for the given request caused by the given
-  // extension.
-  void IncrementExtensionBlockTime(
-      const std::string& extension_id,
-      int64 request_id,
-      const base::TimeDelta& block_time);
-
-  // Records an additional delay for the given request caused by all extensions
-  // combined.
-  void IncrementTotalBlockTime(
-      int64 request_id,
-      const base::TimeDelta& block_time);
-
-  // Called when an extension has canceled the given request.
-  void SetRequestCanceled(int64 request_id);
-
-  // Called when an extension has redirected the given request to another URL.
-  void SetRequestRedirected(int64 request_id);
-
-  // Takes ownership of |delegate|.
-  void SetDelegate(ExtensionWebRequestTimeTrackerDelegate* delegate);
-
- private:
-  // Timing information for a single request.
-  struct RequestTimeLog {
-    GURL url;  // used for debug purposes only
-    void* profile;  // profile that created the request
-    bool completed;
-    base::Time request_start_time;
-    base::TimeDelta request_duration;
-    base::TimeDelta block_duration;
-    std::map<std::string, base::TimeDelta> extension_block_durations;
-    RequestTimeLog();
-    ~RequestTimeLog();
-  };
-
-  // Called after a request finishes, to analyze the delays and warn the user
-  // if necessary.
-  void Analyze(int64 request_id);
-
-  // Returns a list of all extension IDs that contributed to delay for |log|.
-  std::set<std::string> GetExtensionIds(const RequestTimeLog& log) const;
-
-  // A map of recent request IDs to timing info for each request.
-  std::map<int64, RequestTimeLog> request_time_logs_;
-
-  // A list of recent request IDs that we know about. Used to limit the size of
-  // the logs.
-  std::queue<int64> request_ids_;
-
-  // The set of recent requests that have been delayed either a large or
-  // moderate amount by extensions.
-  std::set<int64> excessive_delays_;
-  std::set<int64> moderate_delays_;
-
-  // Defaults to a delegate that sets warnings in the extension service.
-  scoped_ptr<ExtensionWebRequestTimeTrackerDelegate> delegate_;
-
-  FRIEND_TEST_ALL_PREFIXES(ExtensionWebRequestTimeTrackerTest, Basic);
-  FRIEND_TEST_ALL_PREFIXES(ExtensionWebRequestTimeTrackerTest,
-                           IgnoreFastRequests);
-  FRIEND_TEST_ALL_PREFIXES(ExtensionWebRequestTimeTrackerTest,
-                           CancelOrRedirect);
-  FRIEND_TEST_ALL_PREFIXES(ExtensionWebRequestTimeTrackerTest, Delays);
-
-  DISALLOW_COPY_AND_ASSIGN(ExtensionWebRequestTimeTracker);
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_TIME_TRACKER_H_