Query NaCl processes' GDB debug port on the correct thread.

chrome/browser/task_manager/sampling/task_group.h

 // Copyright 2015 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 CHROME_BROWSER_TASK_MANAGER_SAMPLING_TASK_GROUP_H_
 #define CHROME_BROWSER_TASK_MANAGER_SAMPLING_TASK_GROUP_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 89 matching lines @@
   int open_fd_count() const { return open_fd_count_; }
 #endif  // defined(OS_LINUX)
 
   int idle_wakeups_per_second() const { return idle_wakeups_per_second_; }
 
  private:
   void RefreshGpuMemory(const gpu::VideoMemoryUsageStats& gpu_memory_stats);
 
   void RefreshWindowsHandles();
 
+#if !defined(DISABLE_NACL)
   // |child_process_unique_id| see Task::GetChildProcessUniqueID().
   void RefreshNaClDebugStubPort(int child_process_unique_id);
+  void OnRefreshNaClDebugStubPortDone(int port);
+#endif
 
   void OnCpuRefreshDone(double cpu_usage);
 
   void OnStartTimeRefreshDone(base::Time start_time);
 
   void OnCpuTimeRefreshDone(base::TimeDelta cpu_time);
 
   void OnPhysicalMemoryUsageRefreshDone(int64_t physical_bytes);
   void OnMemoryUsageRefreshDone(MemoryUsageStats memory_usage);
 
@@ skipping 59 matching lines @@
   // Always keep this the last member of this class so that it's the first to be
   // destroyed.
   base::WeakPtrFactory<TaskGroup> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskGroup);
 };
 
 }  // namespace task_manager
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_SAMPLING_TASK_GROUP_H_