Remove more feature in product mode

runtime/lib/timeline.cc

Index: runtime/lib/timeline.cc
diff --git a/runtime/lib/timeline.cc b/runtime/lib/timeline.cc
index 3d307da94b44cd9b7f9176d57f2c027e85a30bfb..51319d7de03e867460f73383a30d611a4389837c 100644
--- a/runtime/lib/timeline.cc
+++ b/runtime/lib/timeline.cc
@@ -23,6 +23,9 @@ DEFINE_NATIVE_ENTRY(Timeline_getIsolateNum, 0) {
 
 
 DEFINE_NATIVE_ENTRY(Timeline_getNextAsyncId, 0) {
+  if (!FLAG_support_timeline) {
+    return Integer::New(0);
+  }
   TimelineEventRecorder* recorder = Timeline::recorder();
   if (recorder == NULL) {
     return Integer::New(0);
@@ -37,6 +40,9 @@ DEFINE_NATIVE_ENTRY(Timeline_getTraceClock, 0) {
 
 
 DEFINE_NATIVE_ENTRY(Timeline_reportTaskEvent, 6) {
+  if (!FLAG_support_timeline) {
+    return Object::null();
+  }
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, start, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, id, arguments->NativeArgAt(1));
   GET_NON_NULL_NATIVE_ARGUMENT(String, phase, arguments->NativeArgAt(2));
@@ -100,6 +106,9 @@ DEFINE_NATIVE_ENTRY(Timeline_reportTaskEvent, 6) {
 
 
 DEFINE_NATIVE_ENTRY(Timeline_reportCompleteEvent, 5) {
+  if (!FLAG_support_timeline) {
+    return Object::null();
+  }
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, start, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, end, arguments->NativeArgAt(1));
   GET_NON_NULL_NATIVE_ARGUMENT(String, category, arguments->NativeArgAt(2));
@@ -143,6 +152,9 @@ DEFINE_NATIVE_ENTRY(Timeline_reportCompleteEvent, 5) {
 
 
 DEFINE_NATIVE_ENTRY(Timeline_reportInstantEvent, 4) {
+  if (!FLAG_support_timeline) {
+    return Object::null();
+  }
   GET_NON_NULL_NATIVE_ARGUMENT(Integer, start, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(String, category, arguments->NativeArgAt(1));
   GET_NON_NULL_NATIVE_ARGUMENT(String, name, arguments->NativeArgAt(2));