telemetry: Add GetRendererProcessFromTab to timeline model.

tools/telemetry/telemetry/core/timeline/model.py

Index: tools/telemetry/telemetry/core/timeline/model.py
diff --git a/tools/telemetry/telemetry/core/timeline/model.py b/tools/telemetry/telemetry/core/timeline/model.py
index 5efddd3aca113ede2a740c372079c67dca183d48..19e5cdf48f7949df723df5b23c9851819b2f1c46 100644
--- a/tools/telemetry/telemetry/core/timeline/model.py
+++ b/tools/telemetry/telemetry/core/timeline/model.py
@@ -10,6 +10,8 @@ https://code.google.com/p/trace-viewer/
 from operator import attrgetter
 
 import telemetry.core.timeline.process as tracing_process
+from telemetry.core import web_contents
+from telemetry.core import browser
 
 # Register importers for data
 from telemetry.core.timeline import inspector_importer
@@ -41,6 +43,7 @@ class TimelineModel(object):
     self._frozen = False
     self.import_errors = []
     self.metadata = []
+    self._core_object_to_timeline_container_map = {}
 
     if event_data is not None:
       self.ImportTraces([event_data], shift_world_to_zero=shift_world_to_zero)
@@ -168,6 +171,14 @@ class TimelineModel(object):
 
     return events
 
+  def GetRendererProcessFromTab(self, tab):
+    return self._core_object_to_timeline_container_map[tab]
+
+  def AddMapping(self, core_object, container):

[nduca, 2013/10/31 07:32:02]

Name should be more precise -- mapping of what, a newbie to the code might
ask...

AddCoreObjectToContainerMapping

[nduca, 2013/10/31 07:32:02]

docstring plz

[ernstm, 2013/11/05 00:25:05]

Done.

[ernstm, 2013/11/05 00:25:05]

Done.

+    assert(isinstance(core_object, web_contents.WebContents) or
+           isinstance(core_object, browser.Browser))
+    self._core_object_to_timeline_container_map[core_object] = container
+
   def _CreateImporter(self, event_data):
     for importer_class in _IMPORTERS:
       if importer_class.CanImport(event_data):