Added functionality to chrome://net-internals/#chromeos page that user

chromeos/dbus/debug_daemon_client.h

 // Copyright (c) 2012 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 CHROMEOS_DBUS_DEBUG_DAEMON_CLIENT_H_
 #define CHROMEOS_DBUS_DEBUG_DAEMON_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted_memory.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_client_implementation_type.h"
 
 namespace dbus {
 class Bus;
 }  // namespace dbus
 
 namespace chromeos {
 
 // DebugDaemonClient is used to communicate with the debug daemon.
 class CHROMEOS_EXPORT DebugDaemonClient {
  public:
   virtual ~DebugDaemonClient();
 
+  // Called once SetDebugMode() is complete. Takes one parameter:
+  // - succeeded: debug mode was changed successfully.
+  typedef base::Callback<void(bool succeeded)> SetDebugModeCallback;
+
+  // Requests to change debug mode to given |subsystem| and calls
+  // |callback| when completed.

[satorux1, 2012/04/10 20:23:12]

how does "subsystem" look like? would be nice to have some examples here.

[ygorshenin1, 2012/04/11 09:04:39]

Done.

+  virtual void SetDebugMode(const std::string& subsystem,
+                            const SetDebugModeCallback& callback) = 0;
+
   // Requests to start system/kernel tracing.
   virtual void StartSystemTracing() = 0;
 
   // Called once RequestStopSystemTracing() is complete. Takes one parameter:
   // - result: the data collected while tracing was active
   typedef base::Callback<void(const scoped_refptr<base::RefCountedString>&
       result)> StopSystemTracingCallback;
 
   // Requests to stop system tracing and calls |callback| when completed.
   virtual bool RequestStopSystemTracing(const StopSystemTracingCallback&
@@ skipping 10 matching lines @@
   // Create() should be used instead.
   DebugDaemonClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DebugDaemonClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_DEBUG_DAEMON_CLIENT_H_