Add layout test bots to changes to api.cc

Also restrict include/ rules to only add bots for changes affecting
headers

R=machenbach@chromium.org

Change-Id: I97dc3c6249994566912a82ac9fbf8c7d3a57890c
Reviewed-on: https://chromium-review.googlesource.com/519342Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45638}

include/PRESUBMIT.py

@@ -8,7 +8,7 @@ See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
-import re
+import os
 
 
 def PostUploadHook(cl, change, output_api):
@@ -17,6 +17,10 @@ def PostUploadHook(cl, change, output_api):
   This hook adds extra try bots to the CL description in order to run layout
   tests in addition to CQ try bots.
   """
+  def header_filter(f):
+    return '.h' in os.path.split(f.LocalPath())[1]
+  if not change.AffectedFiles(file_filter=header_filter):
+    return []
   return output_api.EnsureCQIncludeTrybotsAreAdded(
     cl,
     [

src/PRESUBMIT.py

+# Copyright 2017 the V8 project authors. All rights reserved.')
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Presubmit script for //v8/src
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into depot_tools.
+"""
+
+import os
+
+
+def PostUploadHook(cl, change, output_api):
+  """git cl upload will call this hook after the issue is created/modified.
+
+  This hook adds extra try bots to the CL description in order to run layout
+  tests in addition to CQ try bots.
+  """
+  def is_api_cc(f):
+    return 'api.cc' == os.path.split(f.LocalPath())[1]
+  if not change.AffectedFiles(file_filter=is_api_cc):
+    return []
+  return output_api.EnsureCQIncludeTrybotsAreAdded(
+    cl,
+    [
+      'master.tryserver.chromium.linux:linux_chromium_rel_ng'
+    ],
+    'Automatically added layout test trybots to run tests on CQ.')