Remove more feature in product mode

runtime/vm/timeline_analysis.cc

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/timeline_analysis.h"
 
 #include "vm/flags.h"
 #include "vm/log.h"
 #include "vm/os_thread.h"
 
 namespace dart {
 
+#ifndef PRODUCT
+
 DECLARE_FLAG(bool, trace_timeline_analysis);
 DECLARE_FLAG(bool, timing);
 
 TimelineAnalysisThread::TimelineAnalysisThread(ThreadId id)
     : id_(id) {
 }
 
 
 TimelineAnalysisThread::~TimelineAnalysisThread() {
 }
@@ skipping 599 matching lines @@
   THR_Print("%.3f ms total on stack; ",
             MicrosecondsToMilliseconds(pause_info->inclusive_micros()));
   THR_Print("%.3f ms total executing; ",
             MicrosecondsToMilliseconds(pause_info->exclusive_micros()));
   THR_Print("%.3f ms max on stack; ",
             MicrosecondsToMilliseconds(pause_info->max_inclusive_micros()));
   THR_Print("%.3f ms max executing.\n",
             MicrosecondsToMilliseconds(pause_info->max_exclusive_micros()));
 }
 
+#endif  // !PRODUCT
+
 }  // namespace dart