NOT FOR REVIEW - prioritize fonts

content/renderer/renderer_high_priority_task_queue.h

+// Copyright (c) 2012 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 CHROME_RENDERER_RENDERER_HIGH_PRIORITY_TASK_QUEUE_H_
+#define CHROME_RENDERER_RENDERER_HIGH_PRIORITY_TASK_QUEUE_H_
+
+#include "base/base_export.h"
+#include "base/basictypes.h"
+#include "base/callback_forward.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/incoming_task_queue.h"
+#include "base/message_loop/message_loop.h"
+#include "base/message_loop/message_pump_default.h"
+#include "base/time/time.h"
+
+namespace tracked_objects {
+class Location;
+} // namespace tracked_objects
+
+namespace content {
+
+class MessagePumpHighPriority : public base::MessagePumpDefault {
+ public:
+  MessagePumpHighPriority();
+  virtual ~MessagePumpHighPriority();
+
+ private:
+
+};
+
+class MessageLoopRendererMainThread : public base::MessageLoop {
+ public:
+  MessageLoopRendererMainThread();
+
+  virtual void ReloadAllWorkQueues() OVERRIDE;
+  virtual base::TaskQueue& GetNextWorkQueue() OVERRIDE;
+  virtual bool HasWorkAvailable() const OVERRIDE;
+
+ private:
+  void ReloadHighPriorityWorkQueue();
+
+  scoped_refptr<base::internal::IncomingTaskQueue>
+      high_priority_incoming_task_queue_;
+  scoped_refptr<base::internal::MessageLoopProxyImpl>
+      high_priority_message_loop_proxy_;
+  base::TaskQueue high_priority_work_queue_;
+};
+
+class RendererHighPriorityTaskQueue {
+ public:
+  static bool PostTask(const tracked_objects::Location& from_here,
+                       const base::Closure& task);
+ private:
+  RendererHighPriorityTaskQueue() {}
+  DISALLOW_COPY_AND_ASSIGN(RendererHighPriorityTaskQueue);
+};
+
+}  // namespace content
+
+#endif  // CHROME_RENDERER_RENDERER_MAIN_PLATFORM_DELEGATE_H_