PRESUBMIT #include check: don't add a warning if we're committing.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index ff620c1852ae742c9995ae8005d7e6ab2a02d326..9acfcb281054a834ff6b9229622417bbf865a886 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -619,8 +619,13 @@ def _CheckIncludeOrder(input_api, output_api):
 
   results = []
   if warnings:
-    results.append(output_api.PresubmitPromptWarning(_INCLUDE_ORDER_WARNING,
-                                                     warnings))
+    if not input_api.is_committing:
+      results.append(output_api.PresubmitPromptWarning(_INCLUDE_ORDER_WARNING,
+                                                       warnings))
+    else:
+      # We don't warn on commit, to avoid stopping commits going through CQ.
+      results.append(output_api.PresubmitNotifyResult(_INCLUDE_ORDER_WARNING,
+                                                      warnings))
   return results