diff --git a/build_overrides/partition_alloc.gni b/build_overrides/partition_alloc.gni
index 981d6d146a..3f674f8e58 100644
--- a/build_overrides/partition_alloc.gni
+++ b/build_overrides/partition_alloc.gni
@@ -6,9 +6,34 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-# Use default values for PartitionAlloc as standalone library from
-# base/allocator/partition_allocator/build_overrides/partition_alloc.gni
-import(
-    "//base/allocator/partition_allocator/build_overrides/partition_alloc.gni")
+# Dependencies from //build defining variables used by partition_alloc.
+import("//build/config/android/config.gni")
+import("//build/config/cast.gni")
+import("//build/config/chromeos/ui_mode.gni")
+import("//build/config/compiler/compiler.gni")
+import("//build/config/cronet/config.gni")
+import("//build/config/dcheck_always_on.gni")
+import("//build/config/logging.gni")
+partition_alloc_enable_arc_config = "//build/config/compiler:enable_arc"
 
+# partition_alloc is performance critical and it should generally be optimized
+# for speed, even in debug mode. WebRTC doesn't really need its debug version.
+partition_alloc_remove_configs =
+    [ "//build/config/compiler:default_optimization" ]
+partition_alloc_add_configs = [ "//build/config/compiler:optimize_speed" ]
+
+# Disable partition_alloc for WebRTC standalone builds.
+use_partition_alloc_as_malloc_default = false
+use_allocator_shim_default = false
+enable_backup_ref_ptr_support_default = false
+enable_backup_ref_ptr_slow_checks_default = false
+enable_dangling_raw_ptr_checks_default = false
+
+# raw_ptr behave like naked pointers, except they are always initialized. This
+# avoids relying on undefined behaviors.
+raw_ptr_zero_on_construct_default = true
+raw_ptr_zero_on_move_default = true
+raw_ptr_zero_on_destruct_default = false
+
+# WebRTC used C++20 by default:
 assert_cpp20_default = true