Start incremental marking on idle notification.

src/incremental-marking.h

Index: src/incremental-marking.h
diff --git a/src/incremental-marking.h b/src/incremental-marking.h
index b5d9f1b9b733a8b460159c37d13a3bd2ce2df8ab..392a66b26125b7de9df5fdbe30ff35fe7451d4bf 100644
--- a/src/incremental-marking.h
+++ b/src/incremental-marking.h
@@ -63,6 +63,8 @@ class IncrementalMarking {
 
   inline bool IsMarkingIncomplete() { return state() == MARKING; }
 
+  inline bool IsComplete() { return state() == COMPLETE; }
+
   bool WorthActivating();
 
   void Start();
@@ -97,10 +99,13 @@ class IncrementalMarking {
   // This is how much we increase the marking/allocating factor by.
   static const intptr_t kAllocationMarkingFactorSpeedup = 2;
   static const intptr_t kMaxAllocationMarkingFactor = 1000;
+  // This is given to Step() function when it is called without any allocation.
+  static const intptr_t kStepFakeAllocatedBytes = kAllocatedThreshold * 3;

[Erik Corry, 2011/11/10 15:06:55]

This is rather ugly.  Instead of lying to the Step function about how much
memory has been allocated, we should create a step function that takes a number
of bytes to scan, and then we should call that from the old Step function.

[ulan, 2011/11/11 13:27:26]

Removed this completely, because the size is now computed using the hint
argument of the IdleNotification.

 
   void OldSpaceStep(intptr_t allocated) {
     Step(allocated * kFastMarking / kInitialAllocationMarkingFactor);
   }
+
   void Step(intptr_t allocated);
 
   inline void RestartIfNotMarking() {