Adding WebRTC logging filter, handler and handler host.

content/renderer/webrtc_logging_message_filter.h

Index: content/renderer/webrtc_logging_message_filter.h
diff --git a/content/renderer/webrtc_logging_message_filter.h b/content/renderer/webrtc_logging_message_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..7dce31b6ae9576fe34c3bc689adb8c3b8412e633
--- /dev/null
+++ b/content/renderer/webrtc_logging_message_filter.h
@@ -0,0 +1,61 @@
+// Copyright (c) 2013 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_RENDERER_WEBRTC_LOGGING_MESSAGE_FILTER_H_
+#define CONTENT_RENDERER_WEBRTC_LOGGING_MESSAGE_FILTER_H_
+
+#include "base/shared_memory.h"
+#include "content/common/content_export.h"
+#include "ipc/ipc_channel_proxy.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace content {
+
+class WebRtcLoggingHandlerImpl;
+
+// Filter for WebRTC logging messages. Sits between WebRtcLoggingHandlerImpl
+// (renderer process) and WebRtcLoggingHandlerHost (browser process). Must be
+// called on the IO thread.
+class CONTENT_EXPORT WebRtcLoggingMessageFilter
+    : public IPC::ChannelProxy::MessageFilter {
+ public:
+  explicit WebRtcLoggingMessageFilter(
+      const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
+
+  virtual void SetDelegate(
+      scoped_refptr<WebRtcLoggingHandlerImpl>& logging_handler);
+  virtual void RemoveDelegate();
+
+  virtual void OpenLog();
+
+ protected:
+  virtual ~WebRtcLoggingMessageFilter();
+
+ private:
+  // IPC::ChannelProxy::MessageFilter implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
+  virtual void OnFilterRemoved() OVERRIDE;
+  virtual void OnChannelClosing() OVERRIDE;
+
+  void OnLogOpened(base::SharedMemoryHandle handle, uint32 length);
+  void OnOpenLogFailed();
+
+  void Send(IPC::Message* message);
+
+  scoped_refptr<WebRtcLoggingHandlerImpl> logging_handler_;
+
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_;
+
+  IPC::Channel* channel_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebRtcLoggingMessageFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_WEBRTC_LOGGING_MESSAGE_FILTER_H_