Move handlified functions from handles.cc to objects.cc

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index c044e1f5789b5a8ee01bf9749736301c490c7d65..4e5c7dbf51329605d5403453e9ace850216a1431 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -122,6 +122,13 @@ typedef ZoneList<Handle<Object> > ZoneObjectList;
     }                                                      \
   } while (false)
 
+#define CHECK_NOT_EMPTY_HANDLE(isolate, call)     \
+  do {                                            \
+    ASSERT(!(isolate)->has_pending_exception());  \
+    CHECK(!(call).is_null());                     \
+    CHECK(!(isolate)->has_pending_exception());   \
+  } while (false)
+
 #define RETURN_IF_EMPTY_HANDLE(isolate, call)                       \
   RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, Failure::Exception())