Fix import order with isort tool.

tools/telemetry/telemetry/timeline/model.py

Index: tools/telemetry/telemetry/timeline/model.py
diff --git a/tools/telemetry/telemetry/timeline/model.py b/tools/telemetry/telemetry/timeline/model.py
index 84cd43650a6470a884fcdb3a478bde6467585850..945a072dac457ec4a00d2040119bac6a42c5c7ca 100644
--- a/tools/telemetry/telemetry/timeline/model.py
+++ b/tools/telemetry/telemetry/timeline/model.py
@@ -10,16 +10,16 @@ https://code.google.com/p/trace-viewer/
 from operator import attrgetter
 
 import telemetry.timeline.process as process_module
-from telemetry.timeline import slice as slice_module
 from telemetry.timeline import async_slice as async_slice_module
-
-# Register importers for data
+from telemetry.timeline import slice as slice_module
 from telemetry.timeline import bounds
 from telemetry.timeline import empty_timeline_data_importer
 from telemetry.timeline import event_container
 from telemetry.timeline import inspector_importer
 from telemetry.timeline import trace_event_importer
 
+# Register importers for data
+
 _IMPORTERS = [
     empty_timeline_data_importer.EmptyTimelineDataImporter,
     inspector_importer.InspectorTimelineImporter,