Revert 107895 - Fully enable about:tracking by default

base/message_loop.h

 // 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 BASE_MESSAGE_LOOP_H_
 #define BASE_MESSAGE_LOOP_H_
 #pragma once
 
 #include <queue>
 #include <string>
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop_proxy.h"
 #include "base/message_pump.h"
 #include "base/observer_list.h"
 #include "base/synchronization/lock.h"
 #include "base/task.h"
-#include "base/tracking_info.h"
 #include "base/time.h"
 
 #if defined(OS_WIN)
 // We need this to declare base::MessagePumpWin::Dispatcher, which we should
 // really just eliminate.
 #include "base/message_pump_win.h"
 #elif defined(OS_POSIX)
 #include "base/message_pump_libevent.h"
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 
 #if defined(USE_WAYLAND)
 #include "base/message_pump_wayland.h"
 #elif defined(TOUCH_UI) || defined(USE_AURA)
 #include "base/message_pump_x.h"
 #else
 #include "base/message_pump_gtk.h"
 #endif
 
 #endif
 #endif
 
 namespace base {
 class Histogram;
 }
 
+#if defined(TRACK_ALL_TASK_OBJECTS)
 namespace tracked_objects {
 class Births;
 }
+#endif  // defined(TRACK_ALL_TASK_OBJECTS)
 
 // A MessageLoop is used to process events for a particular thread.  There is
 // at most one MessageLoop instance per thread.
 //
 // Events include at a minimum Task instances submitted to PostTask or those
 // managed by TimerManager.  Depending on the type of message pump used by the
 // MessageLoop other events such as UI messages may be processed.  On Windows
 // APC calls (as time permits) and signals sent to a registered set of HANDLEs
 // may also be processed.
 //
@@ skipping 341 matching lines @@
     ~AutoRunState();
    private:
     MessageLoop* loop_;
     RunState* previous_state_;
   };
 #if defined(OS_ANDROID)
  protected:
 #endif
 
   // This structure is copied around by value.
-  struct PendingTask : public base::TrackingInfo {
+  struct PendingTask {
     PendingTask(const base::Closure& task,
                 const tracked_objects::Location& posted_from,
                 base::TimeTicks delayed_run_time,
                 bool nestable);
     ~PendingTask();
 
     // Used to support sorting.
     bool operator<(const PendingTask& other) const;
 
     // The task to run.
     base::Closure task;
 
+#if defined(TRACK_ALL_TASK_OBJECTS)
+    // Counter for location where the Closure was posted from.
+    tracked_objects::Births* post_births;
+#endif  // defined(TRACK_ALL_TASK_OBJECTS)
+
+    // Time this PendingTask was posted.
+    base::TimeTicks time_posted;
+
+    // The time when the task should be run.
+    base::TimeTicks delayed_run_time;
+
     // The site this PendingTask was posted from.
     tracked_objects::Location posted_from;
 
     // Secondary sort key for run time.
     int sequence_num;
 
     // OK to dispatch from a nested loop.
     bool nestable;
   };
 
@@ skipping 264 matching lines @@
 #endif  // defined(OS_POSIX)
 };
 
 // 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.
 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
                MessageLoopForIO_should_not_have_extra_member_variables);
 
 #endif  // BASE_MESSAGE_LOOP_H_