Add a presubmit script to check if eventSender still be used for new layout tests

third_party/WebKit/LayoutTests/PRESUBMIT.py

Index: third_party/WebKit/LayoutTests/PRESUBMIT.py
diff --git a/third_party/WebKit/LayoutTests/PRESUBMIT.py b/third_party/WebKit/LayoutTests/PRESUBMIT.py
index 87d981c1ca1ce40e1cffc024c45c13cd5ede8745..ca7b4f986f0f2f6355e4740ab46787a44503aa97 100644
--- a/third_party/WebKit/LayoutTests/PRESUBMIT.py
+++ b/third_party/WebKit/LayoutTests/PRESUBMIT.py
@@ -87,10 +87,27 @@ def _CheckIdenticalFiles(input_api, output_api):
     return errors
 
 
+def _CheckFilesUsingEventSender(input_api, output_api):
+    """Check if any new layout tests still use eventSender. If they do, we encourage replacing them with
+       chrome.gpuBenchmarking.pointerActionSequence.
+    """
+    results = []
+    actions = ["eventSender.touch", "eventSender.mouse", "eventSender.gesture"]
+    for f in input_api.AffectedFiles():
+        if f.Action() == 'A':
+            for line_num, line in f.ChangedContents():
+                if any(action in line for action in actions):
+                    results.append(output_api.PresubmitError(
+                        'Files that still use eventSender: %s:%d %s, please use chrome.gpuBenchmarking.pointerActionSequence instead.' %
+                        (f.LocalPath(), line_num, line)))
+    return results
+
+
 def CheckChangeOnUpload(input_api, output_api):
     results = []
     results.extend(_CheckTestharnessResults(input_api, output_api))
     results.extend(_CheckIdenticalFiles(input_api, output_api))
+    results.extend(_CheckFilesUsingEventSender(input_api, output_api))
     return results
 
 
@@ -98,4 +115,5 @@ def CheckChangeOnCommit(input_api, output_api):
     results = []
     results.extend(_CheckTestharnessResults(input_api, output_api))
     results.extend(_CheckIdenticalFiles(input_api, output_api))
+    results.extend(_CheckFilesUsingEventSender(input_api, output_api))
     return results