Start incremental marking on idle notification.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 40a89e2fac513c9348990b63450b1754ca664a8c..495d6eb1e99898f40bcc5dd86e2a0c7d597deceb 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -4003,12 +4003,12 @@ void v8::V8::GetHeapStatistics(HeapStatistics* heap_statistics) {
 }
 
 
-bool v8::V8::IdleNotification() {
+bool v8::V8::IdleNotification(int hint) {
   // Returning true tells the caller that it need not
   // continue to call IdleNotification.
   i::Isolate* isolate = i::Isolate::Current();
   if (isolate == NULL || !isolate->IsInitialized()) return true;
-  return i::V8::IdleNotification();
+  return i::V8::IdleNotification(hint);
 }