Add InputEvent and EventPacket types for batched input delivery

content/common/input/input_event.cc

+// Copyright (c) 2013 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/common/input/input_event.h"
+
+#include "base/logging.h"
+
+namespace content {
+
+InputEvent::InputEvent()
+    : id_(0) {}
+
+InputEvent::~InputEvent() {}
+
+scoped_ptr<InputEvent> InputEvent::Create(int64 id,
+                                          scoped_ptr<Payload> payload) {
+  scoped_ptr<InputEvent> event(new InputEvent());
+  event->Initialize(id, payload.Pass());
+  return event.Pass();
+}
+
+void InputEvent::Initialize(int64 id, scoped_ptr<Payload> payload) {
+  DCHECK(!valid()) << "InputEvent already initialized.";
+  id_ = id;
+  payload_ = payload.Pass();
+  DCHECK(valid()) << "InputEvent initialization failed.";
+}
+
+}  // namespace content