[EXPERIMENT] Revert "Route D3D VSync signal to Compositor"

content/browser/compositor/gpu_vsync_begin_frame_source.cc

Index: content/browser/compositor/gpu_vsync_begin_frame_source.cc
diff --git a/content/browser/compositor/gpu_vsync_begin_frame_source.cc b/content/browser/compositor/gpu_vsync_begin_frame_source.cc
deleted file mode 100644
index f9414105a00a395fe48c3f911079387105fe2099..0000000000000000000000000000000000000000
--- a/content/browser/compositor/gpu_vsync_begin_frame_source.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2016 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 "content/browser/compositor/gpu_vsync_begin_frame_source.h"
-
-namespace content {
-
-GpuVSyncBeginFrameSource::GpuVSyncBeginFrameSource(
-    GpuVSyncControl* vsync_control)
-    : cc::ExternalBeginFrameSource(this),
-      vsync_control_(vsync_control),
-      needs_begin_frames_(false),
-      next_sequence_number_(cc::BeginFrameArgs::kStartingFrameNumber) {
-  DCHECK(vsync_control);
-}
-
-GpuVSyncBeginFrameSource::~GpuVSyncBeginFrameSource() = default;
-
-void GpuVSyncBeginFrameSource::OnVSync(base::TimeTicks timestamp,
-                                       base::TimeDelta interval) {
-  if (!needs_begin_frames_)
-    return;
-
-  base::TimeTicks now = base::TimeTicks::Now();
-  base::TimeTicks deadline = now.SnappedToNextTick(timestamp, interval);
-
-  TRACE_EVENT1("cc", "GpuVSyncBeginFrameSource::OnVSync", "latency",
-               (now - timestamp).ToInternalValue());
-
-  next_sequence_number_++;
-  OnBeginFrame(cc::BeginFrameArgs::Create(
-      BEGINFRAME_FROM_HERE, source_id(), next_sequence_number_, timestamp,
-      deadline, interval, cc::BeginFrameArgs::NORMAL));
-}
-
-void GpuVSyncBeginFrameSource::OnNeedsBeginFrames(bool needs_begin_frames) {
-  needs_begin_frames_ = needs_begin_frames;
-  vsync_control_->SetNeedsVSync(needs_begin_frames);
-}
-
-void GpuVSyncBeginFrameSource::OnDidFinishFrame(const cc::BeginFrameAck& ack) {}
-
-}  // namespace content