Use a direct include of the message_loop header in ppapi/, printing/, rlz/, sync/.

sync/engine/syncer.cc

 // Copyright (c) 2012 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 "sync/engine/syncer.h"
 
 #include "base/debug/trace_event.h"
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "sync/engine/apply_control_data_updates.h"
 #include "sync/engine/apply_updates_and_resolve_conflicts_command.h"
 #include "sync/engine/build_commit_command.h"
 #include "sync/engine/commit.h"
 #include "sync/engine/conflict_resolver.h"
 #include "sync/engine/download.h"
 #include "sync/engine/net/server_connection_manager.h"
 #include "sync/engine/process_commit_response_command.h"
@@ skipping 128 matching lines @@
 bool Syncer::HandleCycleEnd(SyncSession* session) {
   if (!ExitRequested()) {
     session->SendEventNotification(SyncEngineEvent::SYNC_CYCLE_ENDED);
     return true;
   } else {
     return false;
   }
 }
 
 }  // namespace syncer