Revert 237848 "Use LatencyInfoSwapPromise to track LatencyInfo t..."

trunk/src/cc/base/latency_info_swap_promise.cc

-// Copyright 2013 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 "cc/base/latency_info_swap_promise.h"
-
-#include "base/logging.h"
-
-namespace {
-  ui::LatencyComponentType DidNotSwapReasonToLatencyComponentType(
-      cc::SwapPromise::DidNotSwapReason reason) {
-    switch (reason) {
-      case cc::SwapPromise::DID_NOT_SWAP_UNKNOWN:
-      case cc::SwapPromise::SWAP_FAILS:
-        return ui::INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT;
-      case cc::SwapPromise::COMMIT_FAILS:
-        return ui::INPUT_EVENT_LATENCY_TERMINATED_COMMIT_FAILED_COMPONENT;
-      case cc::SwapPromise::SWAP_PROMISE_LIST_OVERFLOW:
-        return ui::LATENCY_INFO_LIST_TERMINATED_OVERFLOW_COMPONENT;
-    }
-    NOTREACHED() << "Unhandled DidNotSwapReason.";
-    return ui::INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT;
-  }
-}  // namespace
-
-namespace cc {
-
-LatencyInfoSwapPromise::LatencyInfoSwapPromise(const ui::LatencyInfo& latency)
-    : latency_(latency) {
-}
-
-LatencyInfoSwapPromise::~LatencyInfoSwapPromise() {
-}
-
-void LatencyInfoSwapPromise::DidSwap(CompositorFrameMetadata* metadata) {
-  DCHECK(!latency_.terminated);
-  // TODO(miletus): Append the |latency_| into metadata's LatencyInfo list
-  // once we remove LatencyInfo merge in GPU side.
-  metadata->latency_info.MergeWith(latency_);
-}
-
-void LatencyInfoSwapPromise::DidNotSwap(DidNotSwapReason reason) {
-  latency_.AddLatencyNumber(DidNotSwapReasonToLatencyComponentType(reason),
-                            0, 0);
-  // TODO(miletus): Turn this back on once per-event LatencyInfo tracking
-  // is enabled in GPU side.
-  // DCHECK(latency_.terminated);
-}
-
-}  // namespace cc