Initiate the script that takes a snapshot of CPU usage

scripts/slave/recipe_modules/auto_bisect/revision_state.py

Index: scripts/slave/recipe_modules/auto_bisect/revision_state.py
diff --git a/scripts/slave/recipe_modules/auto_bisect/revision_state.py b/scripts/slave/recipe_modules/auto_bisect/revision_state.py
index f6a7d0194b21499f1ecda3ef75b22d95443d9758..8dd203b8fbb0b679086882b0f205caabb2e96844 100644
--- a/scripts/slave/recipe_modules/auto_bisect/revision_state.py
+++ b/scripts/slave/recipe_modules/auto_bisect/revision_state.py
@@ -75,6 +75,7 @@ class RevisionState(object):
     self.commit_hash = str(commit_hash)
     self._rev_str = None
     self.base_revision = base_revision
+    self.snapshot = []
     if self.base_revision:
       assert self.base_revision.deps_file_contents
       self.needs_patch = True
@@ -183,7 +184,7 @@ class RevisionState(object):
       return self.bisector.api.m.gitiles.download_file(
           repository_url=url, file_path=file_name, branch=branch)
     except TypeError:
-      print 'Could not read content for %s/%s/%s' % (url, file_name, branch) 
+      print 'Could not read content for %s/%s/%s' % (url, file_name, branch)
       return None
 
   def read_deps(self, recipe_tester_name):
@@ -490,7 +491,17 @@ class RevisionState(object):
       skip_download = self.bisector.last_tested_revision == self
       self.bisector.last_tested_revision = self
       overrides = perf_test_properties['properties']
-      api.run_local_test_run(overrides, skip_download=skip_download)
+      snapshot_result = api.m.step(
+                      'Take a Snapshot of CPU',
+                      ['python', api.resource('cpu_usage.py')],
+                      stdout=api.m.json.output())
+      process_list = snapshot_result.stdout
+      if process_list:
+        process_list = [str(process) for process in process_list]
+        self.snapshot = process_list
+        api.m.step.active_result.presentation.logs['CPU snapshot'] = \
+          process_list
+        api.run_local_test_run(overrides, skip_download=skip_download)
     else:
       step_name = 'Triggering test job for ' + self.commit_hash
       api.m.trigger(perf_test_properties, name=step_name)