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

media/base/media_log.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 MEDIA_BASE_MEDIA_LOG_H_
+#define MEDIA_BASE_MEDIA_LOG_H_
+#pragma once
+
+#include "base/memory/ref_counted.h"
+#include "base/process.h"
+#include "base/time.h"
+#include "base/values.h"
+
+namespace media {
+
+class MediaLog : public base::RefCountedThreadSafe<MediaLog> {
+public:
+  enum EventType {
+#define EVENT(type) type,
+#include "media_event_types.h"
+#undef EVENT
+  };
+
+  struct Event {
+    base::ProcessId renderer;

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

media module shouldn't know about different chrome process types, so this should
just be "pid". 

[Scott Franklin, 2011/07/29 22:30:25]

Or, since the messages are now being handled by RenderMessageFilter (which has a
process identifier), it can just be removed altogether.

+    int32 id;
+    EventType type;
+    DictionaryValue params;
+    base::Time time;
+  };
+
+  // Return a string to represent an EventType.
+  static const char* EventTypeToString(EventType type);
+
+  MediaLog();
+
+  // Methods called by loggers when events occur. These generate appropriate
+  // event parameters so the caller need not worry about them.
+  void Load(const std::string& url);
+
+  // Add an event to this log. Overriden by inheritors to actually do something
+  // with it.
+  // Takes ownership of |event|.
+  virtual void AddEvent(Event* event);
+
+  // Convenience method for adding an event with no parameters.
+  void AddEventOfType(EventType type);
+
+  // Convenience method for filling in common fields of a new event.
+  Event* CreateEvent(EventType type);
+
+protected:
+  friend class base::RefCountedThreadSafe<MediaLog>;
+  virtual ~MediaLog();
+
+private:
+  // A unique (to this process) id for this MediaLog.
+  int32 id_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaLog);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_MEDIA_LOG_H_