Deletes base::MessageLoop::set_thread_name().

base/message_loop/message_loop.h

 // Copyright 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 BASE_MESSAGE_LOOP_MESSAGE_LOOP_H_
 #define BASE_MESSAGE_LOOP_MESSAGE_LOOP_H_
 
 #include <memory>
 #include <queue>
 #include <string>
@@ skipping 273 matching lines @@
     pump_->SetTimerSlack(timer_slack);
   }
 
   // Returns true if this loop is |type|. This allows subclasses (especially
   // those in tests) to specialize how they are identified.
   virtual bool IsType(Type type) const;
 
   // Returns the type passed to the constructor.
   Type type() const { return type_; }
 
-  // Optional call to connect the thread name with this loop.
-  void set_thread_name(const std::string& thread_name) {
-    DCHECK(thread_name_.empty()) << "Should not rename this thread!";
-    thread_name_ = thread_name;
-  }
-  const std::string& thread_name() const { return thread_name_; }
+  // Returns the name of the thread this message loop is bound to.
+  // This function is only valid when this message loop is running and
+  // BindToCurrentThread has already been called.
+  std::string GetThreadName() const;
 
   // Gets the TaskRunner associated with this message loop.
   const scoped_refptr<SingleThreadTaskRunner>& task_runner() {
     return task_runner_;
   }
 
   // Sets a new TaskRunner for this message loop. The message loop must already
   // have been bound to a thread prior to this call, and the task runner must
   // belong to that thread. Note that changing the task runner will also affect
   // the ThreadTaskRunnerHandle for the target thread. Must be called on the
@@ skipping 200 matching lines @@
   ObserverList<NestingObserver> nesting_observers_;
 
   // A recursion block that prevents accidentally running additional tasks when
   // insider a (accidentally induced?) nested message pump.
   bool nestable_tasks_allowed_;
 
   // pump_factory_.Run() is called to create a message pump for this loop
   // if type_ is TYPE_CUSTOM and pump_ is null.
   MessagePumpFactoryCallback pump_factory_;
 
-  std::string thread_name_;
   // A profiling histogram showing the counts of various messages and events.
   HistogramBase* message_histogram_;
 
   RunLoop* run_loop_;
 
   ObserverList<TaskObserver> task_observers_;
 
   debug::TaskAnnotator task_annotator_;
 
   scoped_refptr<internal::IncomingTaskQueue> incoming_task_queue_;
 
   // A task runner which we haven't bound to a thread yet.
   scoped_refptr<internal::MessageLoopTaskRunner> unbound_task_runner_;
 
   // The task runner associated with this message loop.
   scoped_refptr<SingleThreadTaskRunner> task_runner_;
   std::unique_ptr<ThreadTaskRunnerHandle> thread_task_runner_handle_;
 
+  // Id of the thread this message loop is bound to.
+  PlatformThreadId thread_id_;
+
   template <class T, class R> friend class base::subtle::DeleteHelperInternal;
   template <class T, class R> friend class base::subtle::ReleaseHelperInternal;
 
   void DeleteSoonInternal(const tracked_objects::Location& from_here,
                           void(*deleter)(const void*),
                           const void* object);
   void ReleaseSoonInternal(const tracked_objects::Location& from_here,
                            void(*releaser)(const void*),
                            const void* object);
 
@@ skipping 132 matching lines @@
 
 // Do not add any member variables to MessageLoopForIO!  This is important b/c
 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO).  Any extra
 // data that you need should be stored on the MessageLoop's pump_ instance.
 static_assert(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
               "MessageLoopForIO should not have extra member variables");
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_LOOP_H_