Remove CastExternalBeginFrameSource

This is no longer needed to reduce headless framerate.
https://chromium-review.googlesource.com/c/chromium/src/+/1815049
is used instead.

Test NONE

Bug: NONE
Change-Id: Iba114a91e6ca07a6383303b729cf5d5b415931db
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2055344
Commit-Queue: Shawn Gallea <sagallea@google.com>
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741167}

chromecast/graphics/BUILD.gn

@@ -49,8 +49,6 @@ cast_source_set("graphics") {
       "accessibility/partial_magnification_controller.h",
       "cast_display_util.cc",
       "cast_display_util.h",
-      "cast_external_begin_frame_source.cc",
-      "cast_external_begin_frame_source.h",
       "cast_focus_client_aura.cc",
       "cast_focus_client_aura.h",
       "cast_touch_event_gate.cc",

chromecast/graphics/cast_external_begin_frame_source.cc

-// Copyright 2019 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 "chromecast/graphics/cast_external_begin_frame_source.h"
-
-#include "base/time/time.h"
-#include "chromecast/graphics/cast_window_manager_aura.h"
-#include "chromecast/graphics/cast_window_tree_host_aura.h"
-
-namespace chromecast {
-namespace {
-constexpr base::TimeDelta kFrameInterval =
-    base::TimeDelta::FromMilliseconds(250);
-constexpr uint64_t kSourceId = viz::BeginFrameArgs::kManualSourceId;
-}  // namespace
-
-CastExternalBeginFrameSource::CastExternalBeginFrameSource(
-    CastWindowManagerAura* cast_window_manager_aura)
-    : cast_window_manager_aura_(cast_window_manager_aura),
-      sequence_number_(viz::BeginFrameArgs::kStartingFrameNumber),
-      weak_factory_(this) {
-  IssueExternalBeginFrame();
-}
-
-CastExternalBeginFrameSource::~CastExternalBeginFrameSource() {}
-
-void CastExternalBeginFrameSource::OnFrameComplete(
-    const viz::BeginFrameAck& ack) {
-  DCHECK_EQ(kSourceId, ack.frame_id.source_id);
-  timer_.Start(
-      FROM_HERE, kFrameInterval,
-      base::BindOnce(&CastExternalBeginFrameSource::IssueExternalBeginFrame,
-                     base::Unretained(this)));
-}
-
-void CastExternalBeginFrameSource::IssueExternalBeginFrame() {
-  const auto now = base::TimeTicks::Now();
-  viz::BeginFrameArgs args = viz::BeginFrameArgs::Create(
-      BEGINFRAME_FROM_HERE, kSourceId, sequence_number_, now,
-      now + kFrameInterval, kFrameInterval, viz::BeginFrameArgs::NORMAL);
-  ui::Compositor* compositor =
-      cast_window_manager_aura_->window_tree_host()->compositor();
-  compositor->context_factory_private()->IssueExternalBeginFrame(
-      compositor, args, false,
-      base::BindOnce(&CastExternalBeginFrameSource::OnFrameComplete,
-                     weak_factory_.GetWeakPtr()));
-  sequence_number_++;
-}
-
-}  // namespace chromecast

chromecast/graphics/cast_external_begin_frame_source.h

-// Copyright 2019 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 CHROMECAST_GRAPHICS_CAST_EXTERNAL_BEGIN_FRAME_SOURCE_H_
-#define CHROMECAST_GRAPHICS_CAST_EXTERNAL_BEGIN_FRAME_SOURCE_H_
-
-#include "base/memory/weak_ptr.h"
-#include "base/timer/timer.h"
-#include "components/viz/common/frame_sinks/begin_frame_args.h"
-
-namespace chromecast {
-
-class CastWindowManagerAura;
-
-class CastExternalBeginFrameSource {
- public:
-  explicit CastExternalBeginFrameSource(
-      CastWindowManagerAura* cast_window_manager_aura);
-  ~CastExternalBeginFrameSource();
-
- private:
-  void OnFrameComplete(const viz::BeginFrameAck& ack);
-  void IssueExternalBeginFrame();
-
-  CastWindowManagerAura* cast_window_manager_aura_;
-  uint64_t sequence_number_;
-  base::OneShotTimer timer_;
-
-  base::WeakPtrFactory<CastExternalBeginFrameSource> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(CastExternalBeginFrameSource);
-};
-
-}  // namespace chromecast
-
-#endif  // CHROMECAST_GRAPHICS_CAST_EXTERNAL_BEGIN_FRAME_SOURCE_H_