Allow IdleNotification to trigger Scavenges.

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

Index: src/heap/gc-idle-time-handler.cc
diff --git a/src/heap/gc-idle-time-handler.cc b/src/heap/gc-idle-time-handler.cc
index 8def9005e647b344685050b96c19bac4fa1e3e98..f36b4cd608228a76dd888a05ac04818e8ef56d90 100644
--- a/src/heap/gc-idle-time-handler.cc
+++ b/src/heap/gc-idle-time-handler.cc
@@ -68,9 +68,24 @@ size_t GCIdleTimeHandler::EstimateMarkCompactTime(
 }
 
 
+size_t GCIdleTimeHandler::EstimateScavengeTime(
+    size_t new_space_size, size_t scavenge_speed_in_bytes_per_ms) {
+  if (scavenge_speed_in_bytes_per_ms == 0) {
+    scavenge_speed_in_bytes_per_ms = kInitialConservativeScavengeSpeed;
+  }
+  return new_space_size / scavenge_speed_in_bytes_per_ms;
+}
+
+
 GCIdleTimeAction GCIdleTimeHandler::Compute(size_t idle_time_in_ms,
                                             HeapState heap_state) {
-  if (IsIdleRoundFinished()) {
+  if (heap_state.available_new_space_memory < kNewSpaceAlmostFullTreshold &&

[ulan, 2014/09/10 14:25:00]

We should also check new space size now against new space size after last idle
scavenge. So that we do not do two scavenges in a row.

+      idle_time_in_ms >=
+          EstimateScavengeTime(heap_state.new_space_capacity,
+                               heap_state.scavenge_speed_in_bytes_per_ms)) {
+    return GCIdleTimeAction::Scavenge();
+  }
+  if (IsMarkCompactIdleRoundFinished()) {
     if (EnoughGarbageSinceLastIdleRound() || heap_state.contexts_disposed > 0) {
       StartIdleRound();
     } else {