[Android] Make devil/ read-only for the move to catapult.

build/android/devil/PRESUBMIT.py

Index: build/android/devil/PRESUBMIT.py
diff --git a/build/android/devil/PRESUBMIT.py b/build/android/devil/PRESUBMIT.py
index 14c0f4f136fb5b860720e0deb9fea0e48eaf767c..08bdc81710934de31b2a2da259ad6ffe5a9d15c4 100644
--- a/build/android/devil/PRESUBMIT.py
+++ b/build/android/devil/PRESUBMIT.py
@@ -72,11 +72,30 @@ def _EnsureNoPylibUse(input_api, output_api):
   return []
 
 
+def _TemporarilyReadOnly(input_api, output_api):
+  # Temporarily make devil/ read-only for the move to catapult.
+  # TODO(jbudorick): Remove this after the move is complete.
+
+  def other_files(f):
+    this_presubmit_file = input_api.os_path.join(
+        input_api.PresubmitLocalPath(), 'PRESUBMIT.py')
+    return not f.AbsoluteLocalPath() == this_presubmit_file
+
+  changed_files = input_api.AffectedSourceFiles(other_files)
+  if changed_files:
+    return [output_api.PresubmitError(
+        'devil/ is temporarily read-only while it moves to catapult. '
+        'Questions? Contact jbudorick@',
+        items=changed_files)]
+  return []
+
+
 def CommonChecks(input_api, output_api):
   output = []
   output += _RunPylint(input_api, output_api)
   output += _RunUnitTests(input_api, output_api)
   output += _EnsureNoPylibUse(input_api, output_api)
+  output += _TemporarilyReadOnly(input_api, output_api)
   return output