Remove non-incremental idle notification handler.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index ec058828e664cec507581ffe40db26b9edcbe2a7..dd00f9e8ab0be9561379371bde27120f2a138588 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -114,9 +114,6 @@ Heap::Heap()
       store_buffer_(this),
       marking_(this),
       incremental_marking_(this),
-      number_idle_notifications_(0),
-      last_idle_notification_gc_count_(0),
-      last_idle_notification_gc_count_init_(false),
       mark_sweeps_since_idle_round_started_(0),
       gc_count_at_last_idle_gc_(0),
       scavenges_since_last_idle_round_(kIdleScavengeThreshold),
@@ -4337,7 +4334,7 @@ bool Heap::IdleNotification(int hint) {
   }
 
   if (!FLAG_incremental_marking || isolate_->serializer_enabled()) {
-    return IdleGlobalGC();
+    return true;
   }
 
   // By doing small chunks of GC work in each IdleNotification,
@@ -4394,66 +4391,6 @@ bool Heap::IdleNotification(int hint) {
 }
 
 
-bool Heap::IdleGlobalGC() {
-  static const int kIdlesBeforeScavenge = 4;
-  static const int kIdlesBeforeMarkSweep = 7;
-  static const int kIdlesBeforeMarkCompact = 8;
-  static const int kMaxIdleCount = kIdlesBeforeMarkCompact + 1;
-  static const unsigned int kGCsBetweenCleanup = 4;
-
-  if (!last_idle_notification_gc_count_init_) {
-    last_idle_notification_gc_count_ = gc_count_;
-    last_idle_notification_gc_count_init_ = true;
-  }
-
-  bool uncommit = true;
-  bool finished = false;
-
-  // Reset the number of idle notifications received when a number of
-  // GCs have taken place. This allows another round of cleanup based
-  // on idle notifications if enough work has been carried out to
-  // provoke a number of garbage collections.
-  if (gc_count_ - last_idle_notification_gc_count_ < kGCsBetweenCleanup) {
-    number_idle_notifications_ =
-        Min(number_idle_notifications_ + 1, kMaxIdleCount);
-  } else {
-    number_idle_notifications_ = 0;
-    last_idle_notification_gc_count_ = gc_count_;
-  }
-
-  if (number_idle_notifications_ == kIdlesBeforeScavenge) {
-    CollectGarbage(NEW_SPACE, "idle notification");
-    new_space_.Shrink();
-    last_idle_notification_gc_count_ = gc_count_;
-  } else if (number_idle_notifications_ == kIdlesBeforeMarkSweep) {
-    // Before doing the mark-sweep collections we clear the
-    // compilation cache to avoid hanging on to source code and
-    // generated code for cached functions.
-    isolate_->compilation_cache()->Clear();
-
-    CollectAllGarbage(kReduceMemoryFootprintMask, "idle notification");
-    new_space_.Shrink();
-    last_idle_notification_gc_count_ = gc_count_;
-
-  } else if (number_idle_notifications_ == kIdlesBeforeMarkCompact) {
-    CollectAllGarbage(kReduceMemoryFootprintMask, "idle notification");
-    new_space_.Shrink();
-    last_idle_notification_gc_count_ = gc_count_;
-    number_idle_notifications_ = 0;
-    finished = true;
-  } else if (number_idle_notifications_ > kIdlesBeforeMarkCompact) {
-    // If we have received more than kIdlesBeforeMarkCompact idle
-    // notifications we do not perform any cleanup because we don't
-    // expect to gain much by doing so.
-    finished = true;
-  }
-
-  if (uncommit) UncommitFromSpace();
-
-  return finished;
-}
-
-
 #ifdef DEBUG
 
 void Heap::Print() {