Rewrite most `Foo* field_` pointer fields to `raw_ptr<Foo> field_`.

DO NOT REVERT (unless absolutely necessary)! Report build breaks to keishi@(APAC)/glazunov@(EMEA)/sebmarchand@(NA) as soon as you see them. Fixes are expected to be trivial.

This commit was generated automatically, by running the following script: tools/clang/rewrite_raw_ptr_fields/rewrite-multiple-platforms.sh on commit fe74bc434e5b7e92d13a328362fcb6df15d8847e

For more information, see MiraclePtr One Pager [1], the PSA at chromium-dev@ [2], and the raw_ptr documentation in //base/memory/raw_ptr.md.

FYI This CL does not enable MiraclePtr protection and we expect no behavior change from this.

[1] https://docs.google.com/document/d/1pnnOAIz_DMWDI4oIOFoMAqLnf_MZ2GsrJNb_dbQ3ZBg/edit?usp=sharing
[2] https://groups.google.com/a/chromium.org/g/chromium-dev/c/vAEeVifyf78/m/SkBUc6PhBAAJ

Binary-Size: Increase of around 500kb was approved for MiraclePtr
Include-Ci-Only-Tests: true
No-Tree-Checks: true
No-Presubmit: true
Bug: 1272324, 1073933
Change-Id: I05c86a83bbb4b3f4b017f361dd7f4e7437697f69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3305132
Commit-Queue: Keishi Hattori <[email protected]>
Reviewed-by: Bartek Nowierski <[email protected]>
Owners-Override: Bartek Nowierski <[email protected]>
Cr-Commit-Position: refs/heads/main@{#945735}
diff --git a/components/prefs/overlay_user_pref_store.cc b/components/prefs/overlay_user_pref_store.cc
index 7861736..4e5c460f 100644
--- a/components/prefs/overlay_user_pref_store.cc
+++ b/components/prefs/overlay_user_pref_store.cc
@@ -9,6 +9,7 @@
 #include <utility>
 
 #include "base/memory/ptr_util.h"
+#include "base/memory/raw_ptr.h"
 #include "base/values.h"
 #include "components/prefs/in_memory_pref_store.h"
 
@@ -31,7 +32,7 @@
  private:
   // Is the update for the ephemeral?
   const bool ephemeral_user_pref_store_;
-  OverlayUserPrefStore* const parent_;
+  const raw_ptr<OverlayUserPrefStore> parent_;
 };
 
 OverlayUserPrefStore::OverlayUserPrefStore(PersistentPrefStore* persistent)