Move ReferencedSurfaceTracker into GpuCompositorFrameSink.

cc/surfaces/embedded_surface_tracker.cc

Index: cc/surfaces/embedded_surface_tracker.cc
diff --git a/cc/surfaces/embedded_surface_tracker.cc b/cc/surfaces/embedded_surface_tracker.cc
deleted file mode 100644
index 45413824c803c074a0e5b8234985f448b193a296..0000000000000000000000000000000000000000
--- a/cc/surfaces/embedded_surface_tracker.cc
+++ /dev/null
@@ -1,95 +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 "cc/surfaces/embedded_surface_tracker.h"
-
-#include <utility>
-
-#include "base/logging.h"
-
-namespace cc {
-
-EmbeddedSurfaceTracker::EmbeddedSurfaceTracker() {}
-
-EmbeddedSurfaceTracker::~EmbeddedSurfaceTracker() {}
-
-void EmbeddedSurfaceTracker::SetCurrentSurfaceId(const SurfaceId& surface_id) {
-  DCHECK(surface_id.is_valid());
-  DCHECK_NE(current_surface_id_, surface_id);
-
-  // The last submitted CompositorFrame for |current_surface_id_| still embeds
-  // the surfaces in |references_to_remove_| and hasn't embedded the surfaces in
-  // |references_to_add_| yet.
-  references_to_remove_.clear();
-  references_to_add_.clear();
-
-  current_surface_id_ = surface_id;
-
-  // Add references from updated |current_surface_id_| to all embedded surfaces.
-  for (auto& map_entry : embedded_surfaces_)
-    AddReference(current_surface_id_, map_entry.second);
-}
-
-bool EmbeddedSurfaceTracker::EmbedSurface(const SurfaceId& embedded_id) {
-  auto iter = embedded_surfaces_.find(embedded_id.frame_sink_id());
-
-  // This is the first surface for the FrameSinkId.
-  if (iter == embedded_surfaces_.end()) {
-    if (HasValidSurfaceId())
-      AddReference(current_surface_id_, embedded_id);
-
-    // Add record that surface is embedded.
-    embedded_surfaces_[embedded_id.frame_sink_id()] = embedded_id;
-    return true;
-  }
-
-  // This is not the first surface for the FrameSinkId, we are unembedding the
-  // old surface and embedding the new surface.
-  SurfaceId& stored_surface_id = iter->second;
-  DCHECK_NE(stored_surface_id, embedded_id);
-
-  if (HasValidSurfaceId()) {
-    RemoveReference(current_surface_id_, stored_surface_id);
-    AddReference(current_surface_id_, embedded_id);
-  }
-
-  stored_surface_id = embedded_id;
-  return false;
-}
-
-void EmbeddedSurfaceTracker::UnembedSurface(const FrameSinkId& frame_sink_id) {
-  auto iter = embedded_surfaces_.find(frame_sink_id);
-  if (iter == embedded_surfaces_.end())
-    return;
-
-  if (HasValidSurfaceId())
-    RemoveReference(current_surface_id_, iter->second);
-
-  // Remove record that surface is embedded.
-  embedded_surfaces_.erase(iter);
-}
-
-std::vector<SurfaceReference> EmbeddedSurfaceTracker::GetReferencesToAdd() {
-  std::vector<SurfaceReference> references;
-  std::swap(references, references_to_add_);
-  return references;
-}
-
-std::vector<SurfaceReference> EmbeddedSurfaceTracker::GetReferencesToRemove() {
-  std::vector<SurfaceReference> references;
-  std::swap(references, references_to_remove_);
-  return references;
-}
-
-void EmbeddedSurfaceTracker::AddReference(const SurfaceId& parent_id,
-                                          const SurfaceId& child_id) {
-  references_to_add_.push_back(SurfaceReference(parent_id, child_id));
-}
-
-void EmbeddedSurfaceTracker::RemoveReference(const SurfaceId& parent_id,
-                                             const SurfaceId& child_id) {
-  references_to_remove_.push_back(SurfaceReference(parent_id, child_id));
-}
-
-}  // namespace cc