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

src/heap/gc-idle-time-handler.h

Index: src/heap/gc-idle-time-handler.h
diff --git a/src/heap/gc-idle-time-handler.h b/src/heap/gc-idle-time-handler.h
index 6a39b78aaa2fcc24fd5210236f177bf0f9fffc14..faccfe2f2da51497074153d3634b947844d07183 100644
--- a/src/heap/gc-idle-time-handler.h
+++ b/src/heap/gc-idle-time-handler.h
@@ -126,6 +126,10 @@ class GCIdleTimeHandler {
   // 16 ms when there is currently no rendering going on.
   static const size_t kMaxScheduledIdleTime = 50;
 
+  // We conservatively assume that in the next kTimeUntilNextIdleEvent ms
+  // no idle notification happens.
+  static const size_t kTimeUntilNextIdleEvent = 100;
+
   // If we haven't recorded any scavenger events yet, we use a conservative
   // lower bound for the scavenger speed.
   static const size_t kInitialConservativeScavengeSpeed = 100 * KB;