Add WebScheduler implementation to HTMLViewer

mojo/services/html_viewer/webscheduler_impl.cc

+// Copyright 2015 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.
+
+// An implementation of WebThread in terms of base::MessageLoop and
+// base::Thread
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "base/tracked_objects.h"
+#include "mojo/services/html_viewer/webscheduler_impl.h"
+
+namespace html_viewer {
+
+WebSchedulerImpl::WebSchedulerImpl(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
+    : task_runner_(task_runner) {
+}
+
+WebSchedulerImpl::~WebSchedulerImpl() {
+}
+
+void WebSchedulerImpl::postIdleTask(const blink::WebTraceLocation& web_location,
+                                    blink::WebScheduler::IdleTask* task) {
+  scoped_ptr<blink::WebScheduler::IdleTask> scoped_task(task);
+  tracked_objects::Location location(web_location.functionName(),
+                                     web_location.fileName(), -1, nullptr);
+  task_runner_->PostTask(location, base::Bind(&WebSchedulerImpl::runIdleTask,
+                                              base::Passed(&scoped_task)));
+}
+
+void WebSchedulerImpl::postLoadingTask(
+    const blink::WebTraceLocation& web_location,
+    blink::WebThread::Task* task) {
+  scoped_ptr<blink::WebThread::Task> scoped_task(task);
+  tracked_objects::Location location(web_location.functionName(),
+                                     web_location.fileName(), -1, nullptr);
+  task_runner_->PostTask(location, base::Bind(&WebSchedulerImpl::runTask,
+                                              base::Passed(&scoped_task)));
+}
+
+void WebSchedulerImpl::shutdown() {
+  task_runner_ = nullptr;
+}
+
+// static
+void WebSchedulerImpl::runIdleTask(
+    scoped_ptr<blink::WebScheduler::IdleTask> task) {
+  // TODO(davemoore) Implement idle scheduling.
+  task->run(0);
+}
+
+// static
+void WebSchedulerImpl::runTask(scoped_ptr<blink::WebThread::Task> task) {
+  task->run();
+}
+
+}  // namespace html_viewer