Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/php/ext/google/protobuf/test.php

Index: third_party/protobuf/php/ext/google/protobuf/test.php
diff --git a/third_party/protobuf/php/ext/google/protobuf/test.php b/third_party/protobuf/php/ext/google/protobuf/test.php
new file mode 100644
index 0000000000000000000000000000000000000000..6bbadd48b18eaf0ea5194ab22d6faa41abe7bcdb
--- /dev/null
+++ b/third_party/protobuf/php/ext/google/protobuf/test.php
@@ -0,0 +1,15 @@
+<?php
+
+
+namespace Google\Protobuf;
+
+$pool = get_generated_pool();
+$pool->addMessage("TestMessage")
+    ->optional("optional_int32_a", "int32", 1)
+    ->optional("optional_int32_b", "int32", 2)
+    ->finalizeToPool()
+    ->finalize();
+
+$test_message = new \TestMessage();
+
+?>