Update GwpAsanLinux fieldtrial testing parameters

We should lower the sampling rate on Linux/ChromeOS, as total page loads
and 95th-99th percentile latency metrics see some minor regressions.

Change-Id: I5dd13af92d68d35de933c2fe63f2de651699e26a
Bug: 1238561
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3663925
Commit-Queue: Chris Thompson <cthomp@chromium.org>
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
Reviewed-by: Chris Thompson <cthomp@chromium.org>
Auto-Submit: Matthew Denton <mpdenton@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1007470}
NOKEYCHECK=True
GitOrigin-RevId: 92f705e9c23ee0354d57248072bff7e2b992f0fa
diff --git a/variations/fieldtrial_testing_config.json b/variations/fieldtrial_testing_config.json
index 9575a4a..d8ad95f 100644
--- a/variations/fieldtrial_testing_config.json
+++ b/variations/fieldtrial_testing_config.json
@@ -4075,11 +4075,12 @@
                 {
                     "name": "Enabled",
                     "params": {
+                        "AllocationSamplingMultiplier": "1500",
                         "AllocationSamplingRange": "16",
-                        "MaxAllocations": "70",
-                        "MaxMetadata": "255",
+                        "MaxAllocations": "50",
+                        "MaxMetadata": "210",
                         "ProcessSamplingBoost2": "10",
-                        "ProcessSamplingProbability": "0.015"
+                        "ProcessSamplingProbability": "0.01"
                     },
                     "enable_features": [
                         "GwpAsanMalloc",