Added idle notification to the API.

src/api.cc

Index: src/api.cc
===================================================================
--- src/api.cc	(revision 2673)
+++ src/api.cc	(working copy)
@@ -2558,6 +2558,10 @@
 }
 
 
+void  v8::V8::IdleNotification(bool is_high_priority) {
+  i::V8::IdleNotification(is_high_priority);
+}
+
 const char* v8::V8::GetVersion() {
   static v8::internal::EmbeddedVector<char, 128> buffer;
   v8::internal::Version::GetString(buffer);