Adding WebRTC logging filter, handler and handler host.

content/renderer/webrtc_logging_handler_impl.h

+// 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_HANDLER_IMPL_H_
+#define CONTENT_RENDERER_WEBRTC_LOGGING_HANDLER_IMPL_H_
+
+#include "base/memory/ref_counted.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 WebRtcLoggingMessageFilter;
+
+// WebRtcLoggingHandlerImpl handles WebRTC logging. There is one object per
+// render thread. It communicates with WebRtcLoggingHandlerHost and receives
+// logging messages from libjingle and writes them to a shared memory buffer.
+class CONTENT_EXPORT WebRtcLoggingHandlerImpl
+    : public base::RefCounted<WebRtcLoggingHandlerImpl> {
+ public:
+  WebRtcLoggingHandlerImpl(
+      const scoped_refptr<WebRtcLoggingMessageFilter>& message_filter,
+      const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
+
+  void OnFilterRemoved();
+
+  void OpenLog();
+
+  void OnLogOpened(base::SharedMemoryHandle handle, uint32 length);
+  void OnOpenLogFailed();
+
+ private:
+  friend class base::RefCounted<WebRtcLoggingHandlerImpl>;
+  virtual ~WebRtcLoggingHandlerImpl();
+
+  scoped_refptr<WebRtcLoggingMessageFilter> message_filter_;
+
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebRtcLoggingHandlerImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_WEBRTC_LOGGING_HANDLER_IMPL_H_