Revert of Revert of telemetry: Clean up SurfaceFlinger statistics

tools/telemetry/telemetry/timeline/surface_flinger_importer.py

Index: tools/telemetry/telemetry/timeline/surface_flinger_importer.py
diff --git a/tools/telemetry/telemetry/timeline/surface_flinger_importer.py b/tools/telemetry/telemetry/timeline/surface_flinger_importer.py
new file mode 100644
index 0000000000000000000000000000000000000000..8995c8e82ad027d49e425ba6f3a2c30b443d9af4
--- /dev/null
+++ b/tools/telemetry/telemetry/timeline/surface_flinger_importer.py
@@ -0,0 +1,39 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from telemetry.timeline import importer
+from telemetry.timeline import surface_flinger_timeline_data
+
+class SurfaceFlingerTimelineImporter(importer.TimelineImporter):
+  def __init__(self, model, timeline_data):
+    super(SurfaceFlingerTimelineImporter, self).__init__(
+        model, timeline_data, import_priority=2)
+    self._events = timeline_data.EventData()
+    self._surface_flinger_process = None
+
+  @staticmethod
+  def CanImport(timeline_data):
+    if isinstance(timeline_data,
+                  surface_flinger_timeline_data.SurfaceFlingerTimelineData):
+      return True
+
+    return False
+
+  def ImportEvents(self):
+    for event in self._events:
+      self._surface_flinger_process = self._model.GetOrCreateProcess(
+          event['pid'])
+      self._surface_flinger_process.name = 'SurfaceFlinger'
+      thread = self._surface_flinger_process.GetOrCreateThread(event['tid'])
+      thread.BeginSlice(event['cat'],
+                        event['name'],
+                        event['ts'],
+                        args=event.get('args'))
+      thread.EndSlice(event['ts'])
+
+  def FinalizeImport(self):
+    '''Called by the Model after all other importers have imported their
+    events.'''
+    self._model.UpdateBounds()
+    self._model.surface_flinger_process = self._surface_flinger_process