[log] Increase CodeEventListener::NameBuffer size

URLs can be fairly long and the original 512 char limit is not enough
for many google pages.

Change-Id: Id4f81214e3fedebc80f26c49034c0997397e10fb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3634779Reviewed-by: Marja Hölttä <marja@chromium.org>
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80439}

src/logging/log.cc

@@ -198,7 +198,7 @@ class CodeEventLogger::NameBuffer {
   int size() const { return utf8_pos_; }
 
  private:
-  static const int kUtf8BufferSize = 512;
+  static const int kUtf8BufferSize = 4096;
   static const int kUtf16BufferSize = kUtf8BufferSize;
 
   int utf8_pos_;