Hookup --complete-timeline flag

runtime/vm/timeline.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 <cstdlib>
 
 #include "vm/atomic.h"
 #include "vm/isolate.h"
 #include "vm/json_stream.h"
 #include "vm/lockers.h"
@@ skipping 72 matching lines @@
 //     |Thread::timeline_block_lock_|
 //       |TimelineEventRecorder::lock_|
 //
 
 void Timeline::InitOnce() {
   ASSERT(recorder_ == NULL);
   // Default to ring recorder being enabled.
   const bool use_ring_recorder = true;
   // Some flags require that we use the endless recorder.
   const bool use_endless_recorder =
-      (FLAG_timeline_dir != NULL) || FLAG_timing;
+      (FLAG_timeline_dir != NULL) || FLAG_timing || FLAG_complete_timeline;
   if (use_endless_recorder) {
     recorder_ = new TimelineEventEndlessRecorder();
   } else if (use_ring_recorder) {
     recorder_ = new TimelineEventRingRecorder();
   }
   vm_stream_ = new TimelineStream();
   vm_stream_->Init("VM", EnableStreamByDefault("VM"), NULL);
   // Global overrides.
 #define ISOLATE_TIMELINE_STREAM_FLAG_DEFAULT(name, not_used)                   \
   stream_##name##_enabled_ = false;
@@ skipping 1363 matching lines @@
       // If an isolate was specified, skip events from other isolates.
       continue;
     }
     ASSERT(event->event_as_json() != NULL);
     result = zone->ConcatStrings(result, event->event_as_json());
   }
   return result;
 }
 
 }  // namespace dart