Remove //net (except for Android test stuff) and sdch

net/base/backoff_entry.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 NET_BASE_BACKOFF_ENTRY_H_
-#define NET_BASE_BACKOFF_ENTRY_H_
-
-#include "base/threading/non_thread_safe.h"
-#include "base/time/time.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-// Provides the core logic needed for randomized exponential back-off
-// on requests to a given resource, given a back-off policy.
-//
-// This utility class knows nothing about network specifics; it is
-// intended for reuse in various networking scenarios.
-class NET_EXPORT BackoffEntry : NON_EXPORTED_BASE(public base::NonThreadSafe) {
- public:
-  // The set of parameters that define a back-off policy.
-  struct Policy {
-    // Number of initial errors (in sequence) to ignore before applying
-    // exponential back-off rules.
-    int num_errors_to_ignore;
-
-    // Initial delay.  The interpretation of this value depends on
-    // always_use_initial_delay.  It's either how long we wait between
-    // requests before backoff starts, or how much we delay the first request
-    // after backoff starts.
-    int initial_delay_ms;
-
-    // Factor by which the waiting time will be multiplied.
-    double multiply_factor;
-
-    // Fuzzing percentage. ex: 10% will spread requests randomly
-    // between 90%-100% of the calculated time.
-    double jitter_factor;
-
-    // Maximum amount of time we are willing to delay our request, -1
-    // for no maximum.
-    int64 maximum_backoff_ms;
-
-    // Time to keep an entry from being discarded even when it
-    // has no significant state, -1 to never discard.
-    int64 entry_lifetime_ms;
-
-    // If true, we always use a delay of initial_delay_ms, even before
-    // we've seen num_errors_to_ignore errors.  Otherwise, initial_delay_ms
-    // is the first delay once we start exponential backoff.
-    //
-    // So if we're ignoring 1 error, we'll see (N, N, Nm, Nm^2, ...) if true,
-    // and (0, 0, N, Nm, ...) when false, where N is initial_backoff_ms and
-    // m is multiply_factor, assuming we've already seen one success.
-    bool always_use_initial_delay;
-  };
-
-  // Lifetime of policy must enclose lifetime of BackoffEntry. The
-  // pointer must be valid but is not dereferenced during construction.
-  explicit BackoffEntry(const Policy* const policy);
-  virtual ~BackoffEntry();
-
-  // Inform this item that a request for the network resource it is
-  // tracking was made, and whether it failed or succeeded.
-  void InformOfRequest(bool succeeded);
-
-  // Returns true if a request for the resource this item tracks should
-  // be rejected at the present time due to exponential back-off policy.
-  bool ShouldRejectRequest() const;
-
-  // Returns the absolute time after which this entry (given its present
-  // state) will no longer reject requests.
-  base::TimeTicks GetReleaseTime() const;
-
-  // Returns the time until a request can be sent.
-  base::TimeDelta GetTimeUntilRelease() const;
-
-  // Causes this object reject requests until the specified absolute time.
-  // This can be used to e.g. implement support for a Retry-After header.
-  void SetCustomReleaseTime(const base::TimeTicks& release_time);
-
-  // Returns true if this object has no significant state (i.e. you could
-  // just as well start with a fresh BackoffEntry object), and hasn't
-  // had for Policy::entry_lifetime_ms.
-  bool CanDiscard() const;
-
-  // Resets this entry to a fresh (as if just constructed) state.
-  void Reset();
-
-  // Returns the failure count for this entry.
-  int failure_count() const { return failure_count_; }
-
- protected:
-  // Equivalent to TimeTicks::Now(), virtual so unit tests can override.
-  virtual base::TimeTicks ImplGetTimeNow() const;
-
- private:
-  // Calculates when requests should again be allowed through.
-  base::TimeTicks CalculateReleaseTime() const;
-
-  // Timestamp calculated by the exponential back-off algorithm at which we are
-  // allowed to start sending requests again.
-  base::TimeTicks exponential_backoff_release_time_;
-
-  // Counts request errors; decremented on success.
-  int failure_count_;
-
-  const Policy* const policy_;
-
-  DISALLOW_COPY_AND_ASSIGN(BackoffEntry);
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_BACKOFF_ENTRY_H_