Fix the test case added in https://codereview.chromium.org/2277063003/

testing/resources/pixel/bug_492.in

Index: testing/resources/pixel/bug_492.in
diff --git a/testing/resources/pixel/bug_492.in b/testing/resources/pixel/bug_492.in
new file mode 100644
index 0000000000000000000000000000000000000000..45c4a6f38b02867475aa757c947d011904f185be
--- /dev/null
+++ b/testing/resources/pixel/bug_492.in
@@ -0,0 +1,64 @@
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+  /Pages 2 0 R
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