Bump win-libfuzzer-asan-rel to 100% experiment.

TBR=jbudorick

Bug: 893614
Change-Id: I87127f02cfb44c1be8c8c6fa6d80544b121bcc4d
Reviewed-on: https://chromium-review.googlesource.com/c/1298328Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602438}

infra/config/branch/cq.cfg

@@ -174,7 +174,7 @@ verifiers {
       }
       builders {
         name: "win-libfuzzer-asan-rel"
-        experiment_percentage: 50
+        experiment_percentage: 100
       }
       builders { name: "win10_chromium_x64_rel_ng" }
       builders {