chromium/third_party/blink/renderer/platform/scheduler/common/features.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/platform/scheduler/common/features.h"

#include "base/command_line.h"
#include "components/miracle_parameter/common/public/miracle_parameter.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/common/switches.h"

namespace blink {
namespace scheduler {

namespace {

enum class PolicyOverride { … };

bool g_intensive_wake_up_throttling_policy_override_cached_ = …;

// Returns the IntensiveWakeUpThrottling policy settings. This is checked once
// on first access and cached. Note that that this is *not* thread-safe!
PolicyOverride GetIntensiveWakeUpThrottlingPolicyOverride() { … }

}  // namespace

void ClearIntensiveWakeUpThrottlingPolicyOverrideCacheForTesting() { … }

bool IsIntensiveWakeUpThrottlingEnabled() { … }

// If a policy override is specified then stick to the published defaults so
// that admins get consistent behaviour that clients can't override. Otherwise
// use the base::FeatureParams.

base::TimeDelta GetIntensiveWakeUpThrottlingGracePeriod(bool loading) { … }

// TODO(crbug.com/1475915): convert this param value to TimeDelta instead of int
// after the experiment.
MIRACLE_PARAMETER_FOR_INT(
    GetLoadingPhaseBufferTimeAfterFirstMeaningfulPaintMillis,
    features::kLoadingPhaseBufferTimeAfterFirstMeaningfulPaint,
    "LoadingPhaseBufferTimeAfterFirstMeaningfulPaintMillis",
    0)

base::TimeDelta GetLoadingPhaseBufferTimeAfterFirstMeaningfulPaint() { … }

BASE_FEATURE(…);

BASE_FEATURE(…);

const base::FeatureParam<CompositorTQPolicyDuringThreadedScroll>::Option
    kCompositorTQPolicyDuringThreadedScrollOptions[] = …;

const base::FeatureParam<CompositorTQPolicyDuringThreadedScroll>
    kCompositorTQPolicyDuringThreadedScroll{ … };

}  // namespace scheduler
}  // namespace blink