1 files changed, 43 insertions, 0 deletions
diff --git a/chromium/ui/base/prediction/empty_predictor.cc b/chromium/ui/base/prediction/empty_predictor.cc
new file mode 100644
index 00000000000..98598808b49
--- /dev/null
+++ b/chromium/ui/base/prediction/empty_predictor.cc
@@ -0,0 +1,43 @@
+// Copyright 2018 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 "ui/base/prediction/empty_predictor.h"
+#include "ui/base/ui_base_features.h"
+
+namespace ui {
+
+EmptyPredictor::EmptyPredictor() {
+  Reset();
+}
+
+EmptyPredictor::~EmptyPredictor() = default;
+
+const char* EmptyPredictor::GetName() const {
+  return features::kPredictorNameEmpty;
+}
+
+void EmptyPredictor::Reset() {
+  last_input_ = base::nullopt;
+}
+
+void EmptyPredictor::Update(const InputData& cur_input) {
+  last_input_ = cur_input;
+}
+
+bool EmptyPredictor::HasPrediction() const {
+  return last_input_.has_value();
+}
+
+std::unique_ptr<InputPredictor::InputData> EmptyPredictor::GeneratePrediction(
+    base::TimeTicks predict_time) const {
+  if (!HasPrediction())
+    return nullptr;
+  return std::make_unique<InputData>(last_input_.value());
+}
+
+base::TimeDelta EmptyPredictor::TimeInterval() const {
+  return kTimeInterval;
+}
+
+}  // namespace ui