Output TimelineEventBlocks in sorted order

runtime/vm/timeline.h

 // 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.
 
 #ifndef VM_TIMELINE_H_
 #define VM_TIMELINE_H_
 
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
 #include "vm/os.h"
@@ skipping 76 matching lines @@
   char* value;
 };
 
 
 // You should get a |TimelineEvent| from a |TimelineStream|.
 class TimelineEvent {
  public:
   // Keep in sync with StateBits below.
   enum EventType {
     kNone,
-    kSerializedJSON,  // Events from Dart code.
     kBegin,
     kEnd,
     kDuration,
     kInstant,
     kAsyncBegin,
     kAsyncInstant,
     kAsyncEnd,
     kNumEventTypes,
   };
 
@@ skipping 272 matching lines @@
                      const char* label);
 
   TimelineEventScope(Thread* thread,
                      TimelineStream* stream,
                      const char* label);
 
   bool ShouldEmitEvent() const {
     return enabled_;
   }
 
+  void set_enabled(bool enabled) {
+    enabled_ = enabled;
+  }
+
   const char* label() const {
     return label_;
   }
 
   TimelineStream* stream() const {
     return stream_;
   }
 
   virtual ~TimelineEventScope();
 
@@ skipping 343 matching lines @@
 
  private:
   TimelineEventBlock* current_;
   TimelineEventRecorder* recorder_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_TIMELINE_H_