Switch to a VM wide timeline recorder

runtime/vm/thread_registry.cc

Index: runtime/vm/thread_registry.cc
diff --git a/runtime/vm/thread_registry.cc b/runtime/vm/thread_registry.cc
index 8ade009c6035e6762ee9f45b39b1ce2dcc00100c..885219a80802bdd0e9011cc00e25039719c91214 100644
--- a/runtime/vm/thread_registry.cc
+++ b/runtime/vm/thread_registry.cc
@@ -9,6 +9,29 @@
 
 namespace dart {
 
+ThreadRegistry::~ThreadRegistry() {
+  {
+    // Each thread that is scheduled in this isolate may have a cached timeline
+    // block. Mark these timeline blocks as finished.
+    MonitorLocker ml(monitor_);
+    TimelineEventRecorder* recorder = Timeline::recorder();
+    if (recorder != NULL) {
+      MutexLocker recorder_lock(&recorder->lock_);
+      for (intptr_t i = 0; i < entries_.length(); i++) {
+        // NOTE: It is only safe to access |entry.state| here.
+        const Entry& entry = entries_.At(i);
+        if (entry.state.timeline_block != NULL) {
+          entry.state.timeline_block->Finish();
+        }
+      }
+    }
+  }
+
+  // Delete monitor.
+  delete monitor_;
+}
+
+
 void ThreadRegistry::SafepointThreads() {
   MonitorLocker ml(monitor_);
   // First wait for any older rounds that are still in progress.