Python server to test the actionable error feature.

net/tools/testserver/testserver.py

Index: net/tools/testserver/testserver.py
diff --git a/net/tools/testserver/testserver.py b/net/tools/testserver/testserver.py
index 5d27dbe82be98aedd60b99db5aacddc8b42bb669..fda7a073ab418c9277d88557e55cc6d8d74d3b3b 100755
--- a/net/tools/testserver/testserver.py
+++ b/net/tools/testserver/testserver.py
@@ -1408,7 +1408,8 @@ class SyncPageHandler(BasePageHandler):
                     self.ChromiumSyncTimeHandler,
                     self.ChromiumSyncBirthdayErrorOpHandler,
                     self.ChromiumSyncTransientErrorOpHandler,
-                    self.ChromiumSyncSyncTabsOpHandler]
+                    self.ChromiumSyncSyncTabsOpHandler,
+                    self.ChromiumSyncErrorOpHandler]
 
     post_handlers = [self.ChromiumSyncCommandHandler,
                      self.ChromiumSyncTimeHandler]
@@ -1496,6 +1497,19 @@ class SyncPageHandler(BasePageHandler):
     self.wfile.write(raw_reply)
     return True;
 
+  def ChromiumSyncErrorOpHandler(self):
+    test_name = "/chromiumsync/error"
+    if not self._ShouldHandleRequest(test_name):
+      return False
+    result, raw_reply = self.server._sync_handler.HandleSetError(
+        self.path)
+    self.send_response(result)
+    self.send_header('Content-Type', 'text/html')
+    self.send_header('Content-Length', len(raw_reply))
+    self.end_headers()
+    self.wfile.write(raw_reply)
+    return True;
+
   def ChromiumSyncSyncTabsOpHandler(self):
     test_name = "/chromiumsync/synctabs"
     if not self._ShouldHandleRequest(test_name):