Chrome Cleaner UI: Enable user-initiated cleanups by default

Bug: 800507
Change-Id: I650e3289a9348a9e350cc5a071fd9fac87aa1e88
Reviewed-on: https://chromium-review.googlesource.com/969581Reviewed-by: Joe Mason <joenotcharles@chromium.org>
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544166}

chrome/browser/safe_browsing/chrome_cleaner/srt_field_trial_win.cc

@@ -43,7 +43,7 @@ const base::Feature kRebootPromptDialogFeature{
     "RebootPromptDialog", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kUserInitiatedChromeCleanupsFeature{
-    "UserInitiatedChromeCleanups", base::FEATURE_DISABLED_BY_DEFAULT};
+    "UserInitiatedChromeCleanups", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // TODO(b/786964): Rename this to remove ByBitness from the feature name once
 // all test scripts have been updated.