parallel_emerge: Set Events' 'kind'

Changed Events to use the new 'kind' keyword so that events are
correctly identified in gCloud datastore.

BUG=chromium:672542
TEST=build_packages

Change-Id: Icd7329fd6cbe326dad0920408a6baa83a62ae87d
Reviewed-on: https://chromium-review.googlesource.com/433183
Commit-Ready: Aviv Keshet <akeshet@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Chris Ching <chingcodes@chromium.org>
diff --git a/scripts/parallel_emerge.py b/scripts/parallel_emerge.py
index 296dc6f..0de2ed5 100644
--- a/scripts/parallel_emerge.py
+++ b/scripts/parallel_emerge.py
@@ -469,7 +469,7 @@
     if "--quiet" not in emerge.opts:
       print("Calculating deps...")
 
-    with cros_event.newEvent(step="generate dependency tree"):
+    with cros_event.newEvent(kind="GenerateDepTree"):
       self.CreateDepgraph(emerge, packages)
       depgraph = emerge.depgraph
 
@@ -927,7 +927,7 @@
   Returns:
     The exit code returned by the subprocess.
   """
-  event = cros_event.newEvent(step="emerge", package=target)
+  event = cros_event.newEvent(kind="EmergePackage", package=target)
   pid = os.fork()
   if pid == 0:
     try: