Revert of Disable the CompilerDispatcher if we don't have idle time

src/compiler-dispatcher/compiler-dispatcher.cc

Index: src/compiler-dispatcher/compiler-dispatcher.cc
diff --git a/src/compiler-dispatcher/compiler-dispatcher.cc b/src/compiler-dispatcher/compiler-dispatcher.cc
index 5cf10aa3eb8ac012143c4f4b486d0e69c3bcfc1c..1b639fe9b0ad7035969b993a2253397461fa595c 100644
--- a/src/compiler-dispatcher/compiler-dispatcher.cc
+++ b/src/compiler-dispatcher/compiler-dispatcher.cc
@@ -110,8 +110,6 @@
 }
 
 bool CompilerDispatcher::Enqueue(Handle<SharedFunctionInfo> function) {
-  if (!IsEnabled()) return false;
-
   // We only handle functions (no eval / top-level code / wasm) that are
   // attached to a script.
   if (!function->script()->IsScript() || !function->is_function() ||
@@ -129,11 +127,6 @@
   return true;
 }
 
-bool CompilerDispatcher::IsEnabled() const {
-  v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate_);
-  return FLAG_compiler_dispatcher && platform_->IdleTasksEnabled(v8_isolate);
-}
-
 bool CompilerDispatcher::IsEnqueued(Handle<SharedFunctionInfo> function) const {
   return GetJobFor(function) != jobs_.end();
 }
@@ -190,7 +183,7 @@
 
 void CompilerDispatcher::ScheduleIdleTaskIfNeeded() {
   v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate_);
-  DCHECK(platform_->IdleTasksEnabled(v8_isolate));
+  if (!platform_->IdleTasksEnabled(v8_isolate)) return;
   if (idle_task_scheduled_) return;
   if (jobs_.empty()) return;
   idle_task_scheduled_ = true;