[Sync] Make BackendMigrator not wait for full sync cycles

chrome/browser/sync/engine/sync_scheduler.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/engine/sync_scheduler.h"
 
 #include <algorithm>
 #include <cstring>
 
 #include "base/compiler_specific.h"
@@ skipping 397 matching lines @@
   ModelSafeGroup group;
 };
 
 void SyncScheduler::ScheduleClearUserData() {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
   PostTask(FROM_HERE, "ScheduleClearUserDataImpl",
            method_factory_.NewRunnableMethod(
                &SyncScheduler::ScheduleClearUserDataImpl));
 }
 
+// TODO(sync): Remove the *Impl methods for the other Schedule*
+// functions, too.
 void SyncScheduler::ScheduleCleanupDisabledTypes() {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
-  PostTask(FROM_HERE, "ScheduleCleanupDisabledTypes",
-           method_factory_.NewRunnableMethod(
-               &SyncScheduler::ScheduleCleanupDisabledTypesImpl));
+  ScheduleSyncSessionJob(
+      TimeDelta::FromSeconds(0), SyncSessionJob::CLEANUP_DISABLED_TYPES,
+      CreateSyncSession(SyncSourceInfo()), FROM_HERE);
 }
 
 void SyncScheduler::ScheduleNudge(
     const TimeDelta& delay,
     NudgeSource source, const ModelTypeBitSet& types,
     const tracked_objects::Location& nudge_location) {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
   SVLOG_LOC(nudge_location, 2)
       << "Nudge scheduled with delay " << delay.InMilliseconds() << " ms, "
       << "source " << GetNudgeSourceString(source) << ", "
@@ skipping 26 matching lines @@
                nudge_location));
 }
 
 void SyncScheduler::ScheduleClearUserDataImpl() {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
   ScheduleSyncSessionJob(
       TimeDelta::FromSeconds(0), SyncSessionJob::CLEAR_USER_DATA,
       CreateSyncSession(SyncSourceInfo()), FROM_HERE);
 }
 
-void SyncScheduler::ScheduleCleanupDisabledTypesImpl() {
-  DCHECK_EQ(MessageLoop::current(), sync_loop_);
-  ScheduleSyncSessionJob(
-      TimeDelta::FromSeconds(0), SyncSessionJob::CLEANUP_DISABLED_TYPES,
-      CreateSyncSession(SyncSourceInfo()), FROM_HERE);
-}
-
 void SyncScheduler::ScheduleNudgeImpl(
     const TimeDelta& delay,
     GetUpdatesCallerInfo::GetUpdatesSource source,
     const ModelTypePayloadMap& types_with_payloads,
     bool is_canary_job, const tracked_objects::Location& nudge_location) {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
 
   SVLOG_LOC(nudge_location, 2)
       << "In ScheduleNudgeImpl with delay "
       << delay.InMilliseconds() << " ms, "
@@ skipping 513 matching lines @@
     copy.is_canary_job = is_canary_job;
     DoSyncSessionJob(copy);
   }
 }
 
 SyncSession* SyncScheduler::CreateSyncSession(const SyncSourceInfo& source) {
   DCHECK_EQ(MessageLoop::current(), sync_loop_);
   ModelSafeRoutingInfo routes;
   std::vector<ModelSafeWorker*> workers;
   session_context_->registrar()->GetModelSafeRoutingInfo(&routes);
+  VLOG(2) << "Creating sync session with routes "
+          << ModelSafeRoutingInfoToString(routes);
   session_context_->registrar()->GetWorkers(&workers);
   SyncSourceInfo info(source);
 
   SyncSession* session(new SyncSession(session_context_.get(), this, info,
       routes, workers));
 
   return session;
 }
 
 void SyncScheduler::PollTimerCallback() {
@@ skipping 86 matching lines @@
 
 #undef SVLOG_LOC
 
 #undef SVLOG
 
 #undef SLOG
 
 #undef ENUM_CASE
 
 }  // browser_sync