Re-enable TestEventInContext

test/cctest/test-trace-event.cc

Index: test/cctest/test-trace-event.cc
diff --git a/test/cctest/test-trace-event.cc b/test/cctest/test-trace-event.cc
index 3327e342a3d4d92788f1dea132d16bb118c2227d..190cb4078296a3e919ffa8fbd6c9f73b5791aa54 100644
--- a/test/cctest/test-trace-event.cc
+++ b/test/cctest/test-trace-event.cc
@@ -257,10 +257,6 @@ TEST(TestEventWithId) {
   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);
@@ -284,4 +280,3 @@ TEST(TestEventInContext) {
 
   i::V8::SetPlatformForTesting(old_platform);
 }
-*/