Delete sky/scheduler

This code is unused. It's not even built.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/963513004

sky/scheduler/BUILD.gn

diff --git a/sky/scheduler/BUILD.gn b/sky/scheduler/BUILD.gn
deleted file mode 100644
index 53cb82a..0000000
--- a/sky/scheduler/BUILD.gn
+++ /dev/null
@@ -1,18 +0,0 @@
-# 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.
-
-source_set("scheduler") {
-  sources = [
-    "scheduler.cc",
-    "scheduler.h",
-    "time_interval.cc",
-    "time_interval.h",
-    "timer.cc",
-    "timer.h",
-  ]
-
-  deps = [
-    "//base",
-  ]
-}

sky/scheduler/scheduler.cc

diff --git a/sky/scheduler/scheduler.cc b/sky/scheduler/scheduler.cc
deleted file mode 100644
index 371d49d..0000000
--- a/sky/scheduler/scheduler.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// 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.
-
-#include "sky/scheduler/scheduler.h"
-
-namespace sky {
-
-Scheduler::Client::~Client() {
-}
-
-Scheduler::Scheduler(Client* client,
-                     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
-    : client_(client), timer_(this, task_runner) {
-}
-
-Scheduler::~Scheduler() {
-}
-
-void Scheduler::SetNeedsFrame() {
-  timer_.SetEnabled(true);
-}
-
-void Scheduler::UpdateFrameDuration(base::TimeDelta estimate) {
-  frame_duration_ = estimate;
-  UpdateTimerInterval();
-}
-
-void Scheduler::UpdateVSync(const TimeInterval& vsync) {
-  vsync_ = vsync;
-  UpdateTimerInterval();
-}
-
-void Scheduler::UpdateTimerInterval() {
-  TimeInterval interval = vsync_;
-  interval.base -= frame_duration_;
-  timer_.SetInterval(interval);
-}
-
-void Scheduler::OnTimerTick(base::TimeTicks now) {
-  timer_.SetEnabled(false);
-  client_->BeginFrame(now, vsync_.NextAfter(now));
-  // We might be deleted here.
-}
-}

sky/scheduler/scheduler.h

diff --git a/sky/scheduler/scheduler.h b/sky/scheduler/scheduler.h
deleted file mode 100644
index 05aace9..0000000
--- a/sky/scheduler/scheduler.h
+++ /dev/null
@@ -1,45 +0,0 @@
-// 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 SKY_SCHEDULER_SCHEDULER_H_
-#define SKY_SCHEDULER_SCHEDULER_H_
-
-#include "base/single_thread_task_runner.h"
-#include "base/time/time.h"
-#include "sky/scheduler/timer.h"
-
-namespace sky {
-
-class Scheduler : public Timer::Client {
- public:
-  class Client {
-   public:
-    virtual void BeginFrame(base::TimeTicks frame_time,
-                            base::TimeTicks deadline) = 0;
-
-   protected:
-    virtual ~Client();
-  };
-
-  Scheduler(Client* client,
-            scoped_refptr<base::SingleThreadTaskRunner> task_runner);
-  ~Scheduler();
-
-  void UpdateFrameDuration(base::TimeDelta estimate);
-  void UpdateVSync(const TimeInterval& vsync);
-
-  void SetNeedsFrame();
-
- private:
-  void UpdateTimerInterval();
-  void OnTimerTick(base::TimeTicks now) override;
-
-  Client* client_;
-  Timer timer_;
-  TimeInterval vsync_;
-  base::TimeDelta frame_duration_;
-};
-}
-
-#endif  // SKY_SCHEDULER_SCHEDULER_H_

sky/scheduler/time_interval.cc

diff --git a/sky/scheduler/time_interval.cc b/sky/scheduler/time_interval.cc
deleted file mode 100644
index 4247448..0000000
--- a/sky/scheduler/time_interval.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-#include "sky/scheduler/time_interval.h"
-
-#include <cstdlib>
-
-namespace sky {
-
-base::TimeTicks TimeInterval::NextAfter(base::TimeTicks when) {
-  int64 offset = std::abs((when - base).ToInternalValue());
-  base::TimeDelta excess =
-      base::TimeDelta::FromInternalValue(offset % duration.ToInternalValue());
-  return when + duration - excess;
-}
-}

sky/scheduler/time_interval.h

diff --git a/sky/scheduler/time_interval.h b/sky/scheduler/time_interval.h
deleted file mode 100644
index 2b00890..0000000
--- a/sky/scheduler/time_interval.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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 SKY_SCHEDULER_TIME_INTERVAL_H_
-#define SKY_SCHEDULER_TIME_INTERVAL_H_
-
-#include "base/time/time.h"
-
-namespace sky {
-
-struct TimeInterval {
-  TimeInterval() {}
-  TimeInterval(base::TimeTicks base, base::TimeDelta duration)
-      : base(base), duration(duration) {}
-
-  base::TimeTicks NextAfter(base::TimeTicks when);
-
-  base::TimeTicks base;
-  base::TimeDelta duration;
-};
-}
-
-#endif  // SKY_SCHEDULER_TIME_INTERVAL_H_

sky/scheduler/timer.cc

diff --git a/sky/scheduler/timer.cc b/sky/scheduler/timer.cc
deleted file mode 100644
index f708da0..0000000
--- a/sky/scheduler/timer.cc
+++ /dev/null
@@ -1,94 +0,0 @@
-// 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.
-
-#include "sky/scheduler/timer.h"
-
-#include <cstdlib>
-
-#include "base/bind.h"
-#include "base/tracked_objects.h"
-
-namespace sky {
-
-// We're willing to slop around 1/4 of a tick duration to avoid trashing our
-// client with irregular ticks.
-static const int64 kTickSlop = 4;
-
-Timer::Client::~Client() {
-}
-
-Timer::Timer(Client* client,
-             scoped_refptr<base::SingleThreadTaskRunner> task_runner)
-    : client_(client),
-      task_runner_(task_runner),
-      enabled_(false),
-      weak_factory_(this) {
-  DCHECK(client_);
-}
-
-Timer::~Timer() {
-}
-
-void Timer::SetEnabled(bool enabled) {
-  enabled_ = enabled;
-
-  if (enabled_ && current_target_.is_null())
-    ScheduleNextTick(base::TimeTicks::Now());
-}
-
-void Timer::SetInterval(const TimeInterval& interval) {
-  interval_ = interval;
-
-  // We don't have a tick scheduled, so there's no need to reschedule it.
-  if (current_target_.is_null())
-    return;
-
-  base::TimeTicks now = base::TimeTicks::Now();
-
-  base::TimeTicks new_target = NextTickTarget(now);
-  base::TimeDelta delta = base::TimeDelta::FromInternalValue(
-      std::abs((new_target - current_target_).ToInternalValue()));
-
-  if (delta * kTickSlop < interval_.duration)
-    return;
-
-  current_target_ = base::TimeTicks();
-  weak_factory_.InvalidateWeakPtrs();
-  PostTickTask(now, new_target);
-}
-
-base::TimeTicks Timer::NextTickTarget(base::TimeTicks now) {
-  base::TimeTicks target = interval_.NextAfter(now);
-
-  // If we're targeting a time that's too soon since the last tick, we push out
-  // the target to the next tick.
-  if ((target - last_tick_) * kTickSlop < interval_.duration)
-    target += interval_.duration;
-
-  return target;
-}
-
-void Timer::ScheduleNextTick(base::TimeTicks now) {
-  PostTickTask(now, NextTickTarget(now));
-}
-
-void Timer::PostTickTask(base::TimeTicks now, base::TimeTicks target) {
-  DCHECK(current_target_.is_null());
-  current_target_ = target;
-  task_runner_->PostDelayedTask(
-      FROM_HERE, base::Bind(&Timer::OnTimerFired, weak_factory_.GetWeakPtr()),
-      current_target_ - now);
-}
-
-void Timer::OnTimerFired() {
-  current_target_ = base::TimeTicks();
-  if (!enabled_)
-    return;
-  base::TimeTicks now = base::TimeTicks::Now();
-  ScheduleNextTick(now);
-  last_tick_ = now;
-  client_->OnTimerTick(now);
-  // We might be deleted here.
-}
-}

sky/scheduler/timer.h

diff --git a/sky/scheduler/timer.h b/sky/scheduler/timer.h
deleted file mode 100644
index df20642..0000000
--- a/sky/scheduler/timer.h
+++ /dev/null
@@ -1,52 +0,0 @@
-// 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 SKY_SCHEDULER_TIMER_H_
-#define SKY_SCHEDULER_TIMER_H_
-
-#include "base/memory/weak_ptr.h"
-#include "base/single_thread_task_runner.h"
-#include "base/time/time.h"
-#include "sky/scheduler/time_interval.h"
-
-namespace sky {
-
-class Timer {
- public:
-  class Client {
-   public:
-    virtual void OnTimerTick(base::TimeTicks now) = 0;
-
-   protected:
-    virtual ~Client();
-  };
-
-  Timer(Client* client,
-        scoped_refptr<base::SingleThreadTaskRunner> task_runner);
-  ~Timer();
-
-  void SetInterval(const TimeInterval& parameters);
-  void SetEnabled(bool enabled);
-
- private:
-  base::TimeTicks NextTickTarget(base::TimeTicks now);
-  void ScheduleNextTick(base::TimeTicks now);
-  void PostTickTask(base::TimeTicks now, base::TimeTicks target);
-  void OnTimerFired();
-
-  Client* client_;
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-
-  TimeInterval interval_;
-  base::TimeTicks last_tick_;
-  base::TimeTicks current_target_;
-
-  bool enabled_;
-
-  base::WeakPtrFactory<Timer> weak_factory_;
-};
-
-}
-
-#endif  // SKY_SCHEDULER_TIMER_H_