NOT FOR REVIEW: Adding prioritized incoming task queue to renderers

content/child/high_priority_resource_filter.h

Index: content/child/high_priority_resource_filter.h
diff --git a/content/child/high_priority_resource_filter.h b/content/child/high_priority_resource_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..db3d6bb986d03c8459613670581c2faa6708f3c1
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+++ b/content/child/high_priority_resource_filter.h
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+// Copyright 2014 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 CONTENT_CHILD_HIGH_PRIORITY_RESOURCE_FILTER_H_
+#define CONTENT_CHILD_HIGH_PRIORITY_RESOURCE_FILTER_H_
+
+#include <set>
+
+#include "base/memory/ref_counted.h"
+#include "base/synchronization/lock.h"
+#include "ipc/message_filter.h"
+#include "webkit/common/resource_type.h"
+
+namespace base {
+class HighPriorityTaskRunner;
+}
+
+namespace content {
+class ResourceDispatcher;
+
+class HighPriorityResourceFilter : public IPC::MessageFilter {
+ public:
+  HighPriorityResourceFilter(
+      ResourceDispatcher* resource_dispatcher,
+      scoped_refptr<base::HighPriorityTaskRunner> runner);
+
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  void AddPendingRequest(int request_id, ResourceType::Type resource_type);
+  void RemovePendingRequest(int request_id);
+
+ private:
+  virtual ~HighPriorityResourceFilter();
+
+  bool IsHighPriorityResourceResonse(const IPC::Message& message);
+
+  ResourceDispatcher* resource_dispatcher_;
+  scoped_refptr<base::HighPriorityTaskRunner> runner_;
+
+  std::set<int> request_ids_;
+  base::Lock request_ids_lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(HighPriorityResourceFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_HIGH_PRIORITY_RESOURCE_FILTER_H_