Add mode to reduce memory usage in idle notification.

test/cctest/test-heap.cc

Index: test/cctest/test-heap.cc
diff --git a/test/cctest/test-heap.cc b/test/cctest/test-heap.cc
index 7bc1a88bb8aa1a6b917c2f12b448ce2a3f378406..8f9559d19577f779288397b046954dc0feae1bb6 100644
--- a/test/cctest/test-heap.cc
+++ b/test/cctest/test-heap.cc
@@ -2243,28 +2243,10 @@ TEST(ResetSharedFunctionInfoCountersDuringIncrementalMarking) {
   IncrementalMarking* marking = CcTest::heap()->incremental_marking();
   marking->Abort();
   marking->Start();
-
-  // The following two calls will increment CcTest::heap()->global_ic_age().
-  const double kLongIdlePauseInSeconds = 1.0;
+  // The following calls will increment CcTest::heap()->global_ic_age().
   CcTest::isolate()->ContextDisposedNotification();
-  CcTest::isolate()->IdleNotificationDeadline(
-      (v8::base::TimeTicks::HighResolutionNow().ToInternalValue() /
-       static_cast<double>(v8::base::Time::kMicrosecondsPerSecond)) +
-      kLongIdlePauseInSeconds);
-
-  while (!marking->IsStopped() && !marking->IsComplete()) {
-    marking->Step(1 * MB, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
-  }
-  if (!marking->IsStopped() || marking->should_hurry()) {
-    // We don't normally finish a GC via Step(), we normally finish by
-    // setting the stack guard and then do the final steps in the stack
-    // guard interrupt.  But here we didn't ask for that, and there is no
-    // JS code running to trigger the interrupt, so we explicitly finalize
-    // here.
-    CcTest::heap()->CollectAllGarbage(Heap::kFinalizeIncrementalMarkingMask,
-                                      "Test finalizing incremental mark-sweep");
-  }
-
+  SimulateIncrementalMarking(CcTest::heap());
+  CcTest::heap()->CollectAllGarbage();
   CHECK_EQ(CcTest::heap()->global_ic_age(), f->shared()->ic_age());
   CHECK_EQ(0, f->shared()->opt_count());
   CHECK_EQ(0, f->shared()->code()->profiler_ticks());
@@ -2303,13 +2285,8 @@ TEST(ResetSharedFunctionInfoCountersDuringMarkSweep) {
   CcTest::heap()->incremental_marking()->Abort();
 
   // The following two calls will increment CcTest::heap()->global_ic_age().
-  // Since incremental marking is off, IdleNotification will do full GC.
-  const double kLongIdlePauseInSeconds = 1.0;
   CcTest::isolate()->ContextDisposedNotification();
-  CcTest::isolate()->IdleNotificationDeadline(
-      (v8::base::TimeTicks::HighResolutionNow().ToInternalValue() /
-       static_cast<double>(v8::base::Time::kMicrosecondsPerSecond)) +
-      kLongIdlePauseInSeconds);
+  CcTest::heap()->CollectAllGarbage();
 
   CHECK_EQ(CcTest::heap()->global_ic_age(), f->shared()->ic_age());
   CHECK_EQ(0, f->shared()->opt_count());