Remove set_sources_assignment_filter from //components/rlz

set_sources_assignment_filter() is considered as a mis-feature
of gn (as it makes it difficult to reason about the BUILD.gn
files individually).

Bug: 1018739
Change-Id: Id1340e7ec64d65905152a1588fbda307fa38f884
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2410237Reviewed-by: Roger Tawa <rogerta@chromium.org>
Commit-Queue: Roger Tawa <rogerta@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806647}

components/rlz/BUILD.gn

@@ -2,17 +2,35 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+# Reset sources_assignment_filter for the BUILD.gn file to prevent
+# regression during the migration of Chromium away from the feature.
+# See docs/no_sources_assignment_filter.md for more information.
+# TODO(crbug.com/1018739): remove this when migration is done.
+set_sources_assignment_filter([])
+
 static_library("rlz") {
   sources = [
     "rlz_tracker.cc",
     "rlz_tracker.h",
-    "rlz_tracker_chromeos.cc",
     "rlz_tracker_delegate.h",
-    "rlz_tracker_ios.cc",
-    "rlz_tracker_mac.cc",
-    "rlz_tracker_win.cc",
   ]
 
+  if (is_ios) {
+    sources += [ "rlz_tracker_ios.cc" ]
+  }
+
+  if (is_mac) {
+    sources += [ "rlz_tracker_mac.cc" ]
+  }
+
+  if (is_win) {
+    sources += [ "rlz_tracker_win.cc" ]
+  }
+
+  if (is_chromeos) {
+    sources += [ "rlz_tracker_chromeos.cc" ]
+  }
+
   deps = [
     "//base",
     "//components/google/core/common",