Re-enable TestEventInContext

test/cctest/test-trace-event.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/v8.h"
 
 #include "src/list.h"
 #include "src/list-inl.h"
@@ skipping 239 matching lines @@
 
   CHECK_EQ(2, GET_TRACE_OBJECTS_LIST->length());
   CHECK_EQ(TRACE_EVENT_PHASE_ASYNC_BEGIN, GET_TRACE_OBJECT(0)->phase);
   CHECK_EQ(event_id, GET_TRACE_OBJECT(0)->id);
   CHECK_EQ(TRACE_EVENT_PHASE_ASYNC_END, GET_TRACE_OBJECT(1)->phase);
   CHECK_EQ(event_id, GET_TRACE_OBJECT(1)->id);
 
   i::V8::SetPlatformForTesting(old_platform);
 }
 
-/*
-TODO(chiniforooshan, crbug.com/647986): enable this again after landing
-https://codereview.chromium.org/2253973003
-
 TEST(TestEventInContext) {
   v8::Platform* old_platform = i::V8::GetCurrentPlatform();
   MockTracingPlatform platform(old_platform);
   i::V8::SetPlatformForTesting(&platform);
 
   static uint64_t isolate_id = 0x20151021;
   {
     TRACE_EVENT_SCOPED_CONTEXT("v8-cat", "Isolate", isolate_id);
     TRACE_EVENT0("v8-cat", "e");
   }
 
   CHECK_EQ(3, GET_TRACE_OBJECTS_LIST->length());
   CHECK_EQ(TRACE_EVENT_PHASE_ENTER_CONTEXT, GET_TRACE_OBJECT(0)->phase);
   CHECK_EQ("Isolate", GET_TRACE_OBJECT(0)->name);
   CHECK_EQ(isolate_id, GET_TRACE_OBJECT(0)->id);
   CHECK_EQ(TRACE_EVENT_PHASE_COMPLETE, GET_TRACE_OBJECT(1)->phase);
   CHECK_EQ("e", GET_TRACE_OBJECT(1)->name);
   CHECK_EQ(TRACE_EVENT_PHASE_LEAVE_CONTEXT, GET_TRACE_OBJECT(2)->phase);
   CHECK_EQ("Isolate", GET_TRACE_OBJECT(2)->name);
   CHECK_EQ(isolate_id, GET_TRACE_OBJECT(2)->id);
 
   i::V8::SetPlatformForTesting(old_platform);
 }
-*/