Revert "Add finalize sweeping event to GCIdleTimeHandler."

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 bc196ce93a181e15dce8817a651ec00a9bae42f3..5a842a85971f42823edc93cba4ca754c408f656a 100644
--- a/src/heap/gc-idle-time-handler.h
+++ b/src/heap/gc-idle-time-handler.h
@@ -14,8 +14,7 @@ enum GCIdleTimeActionType {
   DO_NOTHING,
   DO_INCREMENTAL_MARKING,
   DO_SCAVENGE,
-  DO_FULL_GC,
-  DO_FINALIZE_SWEEPING
+  DO_FULL_GC
 };
 
 
@@ -27,21 +26,18 @@ class GCIdleTimeAction {
     result.parameter = 0;
     return result;
   }
-
   static GCIdleTimeAction IncrementalMarking(intptr_t step_size) {
     GCIdleTimeAction result;
     result.type = DO_INCREMENTAL_MARKING;
     result.parameter = step_size;
     return result;
   }
-
   static GCIdleTimeAction Scavenge() {
     GCIdleTimeAction result;
     result.type = DO_SCAVENGE;
     result.parameter = 0;
     return result;
   }
-
   static GCIdleTimeAction FullGC() {
     GCIdleTimeAction result;
     result.type = DO_FULL_GC;
@@ -49,13 +45,6 @@ class GCIdleTimeAction {
     return result;
   }
 
-  static GCIdleTimeAction FinalizeSweeping() {
-    GCIdleTimeAction result;
-    result.type = DO_FINALIZE_SWEEPING;
-    result.parameter = 0;
-    return result;
-  }
-
   GCIdleTimeActionType type;
   intptr_t parameter;
 };
@@ -83,25 +72,20 @@ class GCIdleTimeHandler {
   static const size_t kInitialConservativeMarkCompactSpeed = 2 * MB;
 
   // Maximum mark-compact time returned by EstimateMarkCompactTime.
-  static const size_t kMaxMarkCompactTimeInMs = 1000000;
-
-  // Minimum time to finalize sweeping phase. The main thread may wait for
-  // sweeper threads.
-  static const size_t kMinTimeForFinalizeSweeping = 100;
+  static const size_t kMaxMarkCompactTimeInMs;
 
   struct HeapState {
     int contexts_disposed;
     size_t size_of_objects;
     bool incremental_marking_stopped;
     bool can_start_incremental_marking;
-    bool sweeping_in_progress;
   };
 
   GCIdleTimeHandler()
       : mark_compacts_since_idle_round_started_(0),
         scavenges_since_last_idle_round_(0) {}
 
-  GCIdleTimeAction Compute(size_t idle_time_in_ms, HeapState heap_state,
+  GCIdleTimeAction Compute(int idle_time_in_ms, HeapState heap_state,
                            GCTracer* gc_tracer);
 
   void NotifyIdleMarkCompact() {