Add Timeline to dart:developer

runtime/vm/timeline_test.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 <cstring>
 
 #include "platform/assert.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
@@ skipping 198 matching lines @@
   EventCounterRecorder() {
     for (intptr_t i = 0; i < TimelineEvent::kNumEventTypes; i++) {
       counts_[i] = 0;
     }
   }
 
   void StreamEvent(TimelineEvent* event) {
     counts_[event->event_type()]++;
   }
 
+  void StreamDartEvent(const char* event) {
+    // NOOP.
+  }
+
   intptr_t CountFor(TimelineEvent::EventType type) {
     return counts_[type];
   }
 
  private:
   intptr_t counts_[TimelineEvent::kNumEventTypes];
 };
 
 
 TEST_CASE(TimelineEventStreamingRecorderBasic) {
@@ skipping 370 matching lines @@
     EXPECT(!pauses.has_error());
     EXPECT_EQ(10, pauses.InclusiveTime("a"));
     EXPECT_EQ(10, pauses.ExclusiveTime("a"));
     EXPECT_EQ(10, pauses.MaxInclusiveTime("a"));
     EXPECT_EQ(8, pauses.MaxExclusiveTime("a"));
   }
   TimelineTestHelper::Clear(recorder);
 }
 
 }  // namespace dart