Use a larger crash key for top-origin's GetDebugString.

This makes it possible to see precursor and nonce info for the
origin for diagnostics, following r631964.

Bug: 918565, 919144, 931895
Change-Id: I7b07e4e34177a0a532c254e313d65ad28e28cdd7
Reviewed-on: https://chromium-review.googlesource.com/c/1478096
Commit-Queue: Charlie Reis <creis@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633797}

chrome/common/chrome_content_client.cc

@@ -429,7 +429,8 @@ void ChromeContentClient::SetActiveURL(const GURL& url,
   static crash_reporter::CrashKeyString<1024> active_url("url-chunk");
   active_url.Set(url.possibly_invalid_spec());
 
-  static crash_reporter::CrashKeyString<64> top_origin_key("top-origin");
+  // Use a large enough size for Origin::GetDebugString.
+  static crash_reporter::CrashKeyString<128> top_origin_key("top-origin");
   top_origin_key.Set(top_origin);
 }