Tag all tracked objects, including Tasks, with the program counter at the site of FROM_HERE.

chrome/browser/sync/profile_sync_service.cc

 // 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.
 
 #include "chrome/browser/sync/profile_sync_service.h"
 
 #include <stddef.h>
 #include <map>
 #include <ostream>
 #include <set>
@@ skipping 487 matching lines @@
 // An invariant has been violated.  Transition to an error state where we try
 // to do as little work as possible, to avoid further corruption or crashes.
 void ProfileSyncService::OnUnrecoverableError(
     const tracked_objects::Location& from_here,
     const std::string& message) {
   unrecoverable_error_detected_ = true;
   unrecoverable_error_message_ = message;
   unrecoverable_error_location_.reset(
       new tracked_objects::Location(from_here.function_name(),
                                     from_here.file_name(),
-                                    from_here.line_number()));
+                                    from_here.line_number(),
+                                    from_here.program_counter()));
 
   // Tell the wizard so it can inform the user only if it is already open.
   wizard_.Step(SyncSetupWizard::FATAL_ERROR);
 
   NotifyObservers();
   LOG(ERROR) << "Unrecoverable error detected -- ProfileSyncService unusable."
       << message;
   std::string location;
   from_here.Write(true, true, &location);
   LOG(ERROR) << location;
@@ skipping 814 matching lines @@
     return false;
 
   return data_type_manager_->state() == DataTypeManager::CONFIGURED;
 }
 
 ProfileSyncService::EncryptedTypes::EncryptedTypes() {
   current.insert(syncable::PASSWORDS);
 }
 
 ProfileSyncService::EncryptedTypes::~EncryptedTypes() {}