Added idle notification to the API.

src/v8.cc

Index: src/v8.cc
===================================================================
--- src/v8.cc	(revision 2673)
+++ src/v8.cc	(working copy)
@@ -156,7 +156,11 @@
   return (hi << 16) + (lo & 0xFFFF);
 }
 
+void V8::IdleNotification(bool is_high_priority) {
+  // todo(bak): Reduce memory footprint.
+}
 
+
 Smi* V8::RandomPositiveSmi() {
   uint32_t random = Random();
   ASSERT(IsPowerOf2(Smi::kMaxValue + 1));