Add trace code to track all posted tasks in message_loop.

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 <set>
 #include <utility>
@@ skipping 547 matching lines @@
   FOR_EACH_OBSERVER(Observer, observers_, OnStateChanged());
   // TODO(akalin): Make an Observer subclass that listens and does the
   // event routing.
   sync_js_controller_.HandleJsEvent(
       "onServiceStateChanged", JsEventDetails());
 }
 
 void ProfileSyncService::ClearStaleErrors() {
   unrecoverable_error_detected_ = false;
   unrecoverable_error_message_.clear();
-  unrecoverable_error_location_.reset();
+  unrecoverable_error_location_ = tracked_objects::Location();
   last_actionable_error_ = SyncProtocolError();
 }
 
 // static
 const char* ProfileSyncService::GetPrefNameForDataType(
     syncable::ModelType data_type) {
   switch (data_type) {
     case syncable::BOOKMARKS:
       return prefs::kSyncBookmarks;
     case syncable::PASSWORDS:
@@ skipping 58 matching lines @@
   NOTREACHED();
 }
 
 // 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.program_counter()));
+  unrecoverable_error_location_ = from_here;
 
   // Tell the wizard so it can inform the user only if it is already open.
   wizard_.Step(SyncSetupWizard::FATAL_ERROR);
 
   NotifyObservers();
   std::string location;
   from_here.Write(true, true, &location);
   LOG(ERROR)
       << "Unrecoverable error detected at " << location
       << " -- ProfileSyncService unusable: " << message;
@@ skipping 992 matching lines @@
         syncable::ModelTypeBitSetFromValue(
             *profile_->GetPrefs()->GetList(prefs::kAcknowledgedSyncTypes));
     syncable::ModelTypeSet registered;
     GetRegisteredDataTypes(&registered);
     syncable::ModelTypeBitSet registered_bit_set =
         syncable::ModelTypeBitSetFromSet(registered);
     unacknowledged = registered_bit_set & ~acknowledged;
   }
   return unacknowledged;
 }