Plumb media data from renderers up to MediaInternals in the browser process.

content/browser/renderer_host/media/media_log_host.h

+// Copyright (c) 2011 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_BROWSER_RENDERER_HOST_MEDIA_MEDIA_LOG_HOST_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_LOG_HOST_H_
+#pragma once
+
+#include "base/values.h"
+#include "content/browser/browser_message_filter.h"
+#include "media/base/media_log.h"
+
+namespace content {
+class ResourceContext;
+}  // namespace content
+
+class MediaLogHost : public BrowserMessageFilter {
+public:

[jam, 2011/07/29 16:08:55]

nit: spacing

+  MediaLogHost(const content::ResourceContext* resource_context);
+
+  // BrowserMessageFilter implementation.
+  virtual void OnChannelClosing();
+  virtual void OnDestruct() const;
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok);
+private:
+  friend class BrowserThread;
+  friend class DeleteTask<MediaLogHost>;
+  virtual ~MediaLogHost();
+
+  // Handle MediaLogMsg_MediaEvent, passing the event off to the MediaObserver.

[jam, 2011/07/29 16:08:55]

nit: we usually don't comment message handlers. esp we don't describe what the
code is doing, since someone can see that by looking at the implementation

+  virtual void OnMediaEvent(const media::MediaLog::Event& event);
+
+  const content::ResourceContext* resource_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaLogHost);
+};
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_LOG_HOST_H_