Turn components/crash into a layered component.

components/crash/browser/BUILD.gn

-# Copyright 2014 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.
-
-if (is_android) {
-  import("//build/config/android/config.gni")
-}
-
-source_set("browser") {
-  sources = [
-    "crash_dump_manager_android.cc",
-    "crash_dump_manager_android.h",
-  ]
-
-  if (is_linux || is_android) {
-    set_sources_assignment_filter([])
-
-    # Want this file on both Linux and Android.
-    sources += [
-      "crash_handler_host_linux.cc",
-      "crash_handler_host_linux.h",
-    ]
-  }
-
-  deps = [
-    "//base",
-    "//components/crash/app",
-    "//content/public/browser",
-    "//content/public/common",
-  ]
-
-  # This is not in the GYP build but this target includes breakpad client
-  # headers, so add the dependency here.
-  if (is_posix && !is_ios) {
-    configs += [ "//breakpad:client_config" ]
-    public_configs = [ "//breakpad:client_config" ]
-  }
-}