Fix most chrome/browser/ui "gn check" problems.

ui/base/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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 import("//ui/ozone/ozone.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 } else if (is_mac) {
   import("//build/config/mac/rules.gni")
 }
 
 build_ime = !is_ios
 
 # As part of building Chrome on iOS, it is necessary to run a tool on
 # the host to load datapack and generate output in a format defined
 # by the platform (this is to support notifications).
 #
-# Introduce a standalone target that build on both 'host' and 'target'
-# toolset that just build the support to load datapack. The dependency
+# Introduce a standalone target that can build on both 'host' and 'target'
+# toolchains that just builds the support to load datapacks. The dependencies
 # should be kept minimal to have to build too many targets with multiple
-# toolsets.
+# toolchains.
 component("ui_data_pack") {
   sources = [
     "resource/data_pack.cc",
     "resource/data_pack.h",
     "resource/data_pack_export.h",
     "resource/resource_handle.h",
     "resource/scale_factor.cc",
     "resource/scale_factor.h",
   ]
 
@@ skipping 313 matching lines @@
     # Empty implementation for all other cases.
     sources += [ "touch/touch_device.cc" ]
   }
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   defines = [ "UI_BASE_IMPLEMENTATION" ]
 
   public_deps = [
+    ":ui_data_pack",
     ":ui_features",
     "//base",
     "//skia",
     "//ui/events:events_base",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
   deps = [
     "//base:base_static",
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
     "//net",
     "//third_party/icu",
     "//third_party/zlib:zlib",
-    "//ui/base:ui_data_pack",
     "//ui/display",
     "//ui/events",
     "//ui/events/devices",
     "//ui/resources",
     "//ui/strings",
     "//url",
   ]
 
   if (is_ios) {
     set_sources_assignment_filter([])
@@ skipping 561 matching lines @@
 if (is_mac) {
   mac_framework_bundle("ui_unittests_framework") {
     testonly = true
     deps = [
       "//ui/resources:ui_test_pak_bundle_data",
     ]
     info_plist = "test/framework-Info.plist"
     output_name = "ui_unittests Framework"
   }
 }