webview-Hard-no-to-persistent-histograms.patch

From: "Kevin F. Haggerty" <haggertk@lineageos.org>
Date: Sun, 27 Dec 2020 09:42:54 -0700
Subject: webview: Hard no to persistent histograms

* It's probably some kind of bug somewhere that these are never
  deleted, but they don't really add value to us in the first
  place.
* Stop eating 4MB every single time any app that uses webview
  ever opens.
* These were guarded by a feature check before
  https://chromium.googlesource.com/chromium/src/+/b86102f2a243

License: GPL-3.0-only - https://spdx.org/licenses/GPL-3.0-only.html
---
 android_webview/browser/aw_field_trials.cc | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/android_webview/browser/aw_field_trials.cc b/android_webview/browser/aw_field_trials.cc
--- a/android_webview/browser/aw_field_trials.cc
+++ b/android_webview/browser/aw_field_trials.cc
@@ -60,13 +60,6 @@ class AwFeatureOverrides {
 }  // namespace
 
 void AwFieldTrials::OnVariationsSetupComplete() {
-  // Persistent histograms must be enabled ASAP, but depends on Features.
-  base::FilePath metrics_dir;
-  if (base::PathService::Get(base::DIR_ANDROID_APP_DATA, &metrics_dir)) {
-    InstantiatePersistentHistogramsWithFeaturesAndCleanup(metrics_dir);
-  } else {
-    NOTREACHED();
-  }
 }
 
 // TODO(crbug.com/1453407): Consider to migrate all WebView feature overrides
--