CSP: Limit origin length in fuzzer

This limits the length of the url used as input for the origin in the
content security policy conversion_util_fuzzer.cc. An domain name is
limited to 253 characters anyway.

Cf. also https://crrev.com/c/2659117

Note: this is a fix for a previously committed CL
https://crrev.com/c/2854743, where by mistake I ended up deleting a
line.

Bug: 1203443
Change-Id: I1e349e3ee597c779db80fba4eae7cb0a96c7a1b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2859859
Commit-Queue: Arthur Sonzogni <[email protected]>
Reviewed-by: Arthur Sonzogni <[email protected]>
Cr-Commit-Position: refs/heads/master@{#877939}
NOKEYCHECK=True
GitOrigin-RevId: 5dcb9c70a8a27dd8e97521b01d3957c9a7dd0b7b

blink/renderer/core/frame/csp/conversion_util_fuzzer.cc

@@ -33,6 +33,7 @@ int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     // Due to this quadratic behavior, we must limit the size of the origin to
     // prevent the fuzzer from triggering OOM crash. Note that real domain names
     // are limited to 253 characters.
+    return EXIT_SUCCESS;
   }
 
   String url = String(data, it - 1 - data);