Add WebScheduler implementation to HTMLViewer

mojo/services/html_viewer/webscheduler_impl.h

+// 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.
+
+#ifndef MOJO_SERVICES_HTML_VIEWER_WEBSCHEDULER_IMPL_H_
+#define MOJO_SERVICES_HTML_VIEWER_WEBSCHEDULER_IMPL_H_
+
+#include "third_party/WebKit/public/platform/WebScheduler.h"
+#include "third_party/WebKit/public/platform/WebThread.h"
+#include "third_party/WebKit/public/platform/WebTraceLocation.h"
+
+namespace html_viewer {
+
+class WebSchedulerImpl : public blink::WebScheduler {
+ public:
+  explicit WebSchedulerImpl(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
+  ~WebSchedulerImpl() override;
+
+ private:
+  void postIdleTask(const blink::WebTraceLocation& location,

[jamesr, 2015/02/25 20:53:22]

document that these functions implement blink::WebScheduler

+                    blink::WebScheduler::IdleTask* task) override;

[jamesr, 2015/02/25 20:53:22]

these functions implement a cross-repo interface, so don't use the override
annotation

+  void postLoadingTask(const blink::WebTraceLocation& location,
+                       blink::WebThread::Task* task) override;
+  void shutdown() override;
+
+  static void runIdleTask(scoped_ptr<blink::WebScheduler::IdleTask> task);

[jamesr, 2015/02/25 20:53:22]

this is chrome code so it should follow chromium naming conventions:

static void RunIdleTask(...);

+  static void runTask(scoped_ptr<blink::WebThread::Task> task);
+
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+};

[jamesr, 2015/02/25 20:53:22]

DISALLOW_COPY_AND_ASSIGN

+
+}  // namespace html_viewer
+
+#endif  // MOJO_SERVICES_HTML_VIEWER_WEBSCHEDULER_IMPL_H_