Roll angle to 46ccef1992a8ede16a596c3dd73cff13c047267d and enable gn check globally.

.gn

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This file is used by the gn meta-buildsystem find the root of the source tree
 # and to set startup options.
 
 # The location of the build configuration file.
 buildconfig = "//build/config/BUILDCONFIG.gn"
 
 # The secondary source root is a parallel directory tree where
 # GN build files are placed when they can not be placed directly
 # in the source tree, e.g. for third party source trees.
 secondary_source = "//build/secondary/"
-
-# The set of targets known to pass 'gn check'. When all targets pass, remove
-# this.
-check_targets = [
-  "//apps/*",
-  "//base/*",
-  "//benchmarks/*",
-  "//build/*",
-  "//buildtools/*",
-  "//cc/*",
-  "//crypto/*",
-  "//dart/*",
-  "//device/*",
-  "//examples/*",
-  "//fusl/*",
-  "//gin/*",
-  "//gpu/*",
-  "//mojo/*",
-  "//mojom/*",
-  "//native_client/*",
-  "//sandbox/*",
-  "//services/*",
-  "//shell/*",
-  "//skia/*",
-  "//testing/*",
-  "//tonic/*",
-  "//tools/*",
-  "//ui/*",
-  "//url/*",
-  "//v8/*",
-]