Revert 107895 - Fully enable about:tracking by default

base/location.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_LOCATION_H_
 #define BASE_LOCATION_H_
 
 #include <string>
 
 #include "base/base_export.h"
 #include "base/values.h"
 
+#ifndef NDEBUG
+#ifndef TRACK_ALL_TASK_OBJECTS
+#define TRACK_ALL_TASK_OBJECTS
+#endif   // TRACK_ALL_TASK_OBJECTS
+#endif  // NDEBUG
+
 namespace tracked_objects {
 
 // Location provides basic info where of an object was constructed, or was
 // significantly brought to life.
 class BASE_EXPORT Location {
  public:
   // Constructor should be called with a long-lived char*, such as __FILE__.
   // It assumes the provided value will persist as a global constant, and it
   // will not make a copy of it.
   Location(const char* function_name,
@@ skipping 51 matching lines @@
 // Define a macro to record the current source location.
 #define FROM_HERE tracked_objects::Location(                                   \
     __FUNCTION__,                                                              \
     __FILE__,                                                                  \
     __LINE__,                                                                  \
     tracked_objects::GetProgramCounter())                                      \
 
 }  // namespace tracked_objects
 
 #endif  // BASE_LOCATION_H_