27   function newAsyncSlice(start, duration, startThread, endThread) {  argument
28     return newAsyncSliceNamed('a', start, duration, startThread, endThread);
31   function newAsyncSliceNamed(name, start, duration, startThread, endThread) {  argument
33     s.duration = duration;
37     subSlice.duration = duration;
58   function newSlice(start, duration) {  argument
59     return newSliceNamed('a', start, duration);
62   function newSliceNamed(name, start, duration) {  argument
63     var s = new tracing.model.Slice('', name, 0, start, {}, duration);
67   function newSliceCategory(category, name, start, duration) {  argument
68     var s = new tracing.model.Slice(category, name, 0, start, {}, duration);