Allow more scavenges in idle notification by increasing the new space limit distance.

test/unittests/heap/gc-idle-time-handler-unittest.cc

Index: test/unittests/heap/gc-idle-time-handler-unittest.cc
diff --git a/test/unittests/heap/gc-idle-time-handler-unittest.cc b/test/unittests/heap/gc-idle-time-handler-unittest.cc
index b5f59bd5108f1792c24a70ece5499d97f3954c8d..fe56a88cc4630ab6442a9a3b2d2e8d27eb56db99 100644
--- a/test/unittests/heap/gc-idle-time-handler-unittest.cc
+++ b/test/unittests/heap/gc-idle-time-handler-unittest.cc
@@ -135,7 +135,7 @@ TEST_F(GCIdleTimeHandlerTest, DoScavengeUnknownScavengeSpeed) {
   GCIdleTimeHandler::HeapState heap_state = DefaultHeapState();
   heap_state.used_new_space_size = kNewSpaceCapacity;
   heap_state.scavenge_speed_in_bytes_per_ms = 0;
-  int idle_time_in_ms = 16;
+  int idle_time_in_ms = 8;
   EXPECT_FALSE(GCIdleTimeHandler::ShouldDoScavenge(
       idle_time_in_ms, heap_state.new_space_capacity,
       heap_state.used_new_space_size, heap_state.scavenge_speed_in_bytes_per_ms,