[code-health] remove effect_proxy.cc (dead)

Bug: 915344
Change-Id: Id09fb177297e014201581fd3a6057cf1961d2cc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2335911Reviewed-by: Majid Valipour <majidvp@chromium.org>
Commit-Queue: George Steel <gtsteel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795510}

third_party/blink/renderer/modules/animationworklet/effect_proxy.cc

-// Copyright 2018 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 "third_party/blink/renderer/modules/animationworklet/effect_proxy.h"
-
-namespace blink {
-
-EffectProxy::EffectProxy(base::Optional<base::TimeDelta> local_time)
-    : local_time_(local_time) {}
-
-void EffectProxy::setLocalTime(double time_ms, bool is_null) {
-  if (is_null) {
-    local_time_.reset();
-    return;
-  }
-  DCHECK(!std::isnan(time_ms));
-  // Convert double to base::TimeDelta because cc/animation expects
-  // base::TimeDelta.
-  //
-  // Note on precision loss: base::TimeDelta has microseconds precision which is
-  // also the precision recommended by the web animation specification as well
-  // [1]. If the input time value has a bigger precision then the conversion
-  // causes precision loss. Doing the conversion here ensures that reading the
-  // value back provides the actual value we use in further computation which
-  // is the least surprising path.
-  // [1] https://drafts.csswg.org/web-animations/#precision-of-time-values
-  local_time_ = base::TimeDelta::FromMillisecondsD(time_ms);
-}
-
-double EffectProxy::localTime(bool& is_null) const {
-  is_null = !local_time_.has_value();
-  return local_time_.value_or(base::TimeDelta()).InMillisecondsF();
-}
-
-base::Optional<base::TimeDelta> EffectProxy::local_time() const {
-  return local_time_;
-}
-
-}  // namespace blink