[cc] Plumb BeginFrameAcks through SurfaceManager to DisplayScheduler.

cc/test/fake_surface_observer.cc

Index: cc/test/fake_surface_observer.cc
diff --git a/cc/test/fake_surface_observer.cc b/cc/test/fake_surface_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..15ed3b9111ee12e7f46f393ed1ca875c4d7e198b
--- /dev/null
+++ b/cc/test/fake_surface_observer.cc
@@ -0,0 +1,40 @@
+// Copyright 2017 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/test/fake_surface_observer.h"
+
+namespace cc {
+
+FakeSurfaceObserver::FakeSurfaceObserver(bool damage_display)
+    : damage_display_(damage_display) {}
+
+FakeSurfaceObserver::~FakeSurfaceObserver() {}
+
+void FakeSurfaceObserver::Reset() {
+  last_ack_ = BeginFrameAck();
+  damaged_surfaces_.clear();
+  last_surface_info_ = SurfaceInfo();
+  last_created_surface_id_ = SurfaceId();
+}
+
+bool FakeSurfaceObserver::IsSurfaceDamaged(const SurfaceId& surface_id) const {
+  return damaged_surfaces_.count(surface_id) > 0;
+}
+
+void FakeSurfaceObserver::OnSurfaceDamaged(const SurfaceId& surface_id,
+                                           const BeginFrameAck& ack,
+                                           bool* changed) {
+  if (ack.has_damage)
+    damaged_surfaces_.insert(surface_id);
+  last_ack_ = ack;
+  if (damage_display_)
+    *changed = true;
+}
+
+void FakeSurfaceObserver::OnSurfaceCreated(const SurfaceInfo& surface_info) {
+  last_created_surface_id_ = surface_info.id();
+  last_surface_info_ = surface_info;
+}
+
+}  // namespace cc