Conenct Chromoting plugin debug log to JS UI.

remoting/host/plugin/host_plugin_logger.h

Index: remoting/host/plugin/host_plugin_logger.h
diff --git a/remoting/host/plugin/host_plugin_logger.h b/remoting/host/plugin/host_plugin_logger.h
new file mode 100644
index 0000000000000000000000000000000000000000..7d216ebd999f93b004a08d1ae4d2f151b262ca68
--- /dev/null
+++ b/remoting/host/plugin/host_plugin_logger.h
@@ -0,0 +1,40 @@
+// 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 REMOTING_HOST_PLUGIN_HOST_PLUGIN_LOGGER_H_
+#define REMOTING_HOST_PLUGIN_HOST_PLUGIN_LOGGER_H_
+
+#include "remoting/base/logger.h"
+
+#include "base/task.h"
+
+class MessageLoop;
+
+namespace remoting {
+
+class HostNPScriptObject;
+
+class HostPluginLogger : public Logger {
+ public:
+  explicit HostPluginLogger(HostNPScriptObject* scriptable);
+  virtual ~HostPluginLogger();
+
+  virtual void va_Log(logging::LogSeverity severity, const char* format,
+                      va_list ap);
+  virtual void va_VLog(int verboselevel, const char* format, va_list ap);
+
+ private:
+  void LogToHostUI(const std::string& message);
+
+  HostNPScriptObject* scriptable_object_;
+  MessageLoop* message_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(HostPluginLogger);
+};
+
+}  // namespace remoting
+
+DISABLE_RUNNABLE_METHOD_REFCOUNT(remoting::HostPluginLogger);
+
+#endif  // REMOTING_HOST_PLUGIN_HOST_PLUGIN_LOGGER_H_