[ios] Excluded harfbuzz-ng and events code

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")
@@ skipping 351 matching lines @@
   # 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/display",
     "//ui/events",
     "//ui/events/devices",
     "//ui/resources",
     "//ui/strings",
     "//url",
   ]
 
+  if (!is_ios) {
+    # iOS does not use Chromium-specific code for event handling.
+    public_deps += [
+      "//ui/events:events_base",
+      "//ui/events/platform",
+    ]
+  }
+
   if (is_ios) {
     set_sources_assignment_filter([])
     sources += [
       "l10n/l10n_util_mac.h",
       "l10n/l10n_util_mac.mm",
     ]
+    public_deps += [ "//ui/events:event_constants" ]
+
     set_sources_assignment_filter(sources_assignment_filter)
   }
 
   if (toolkit_views) {
     deps += [ "//ui/events" ]
   }
 
   if (use_x11) {
     public_deps += [ "//ui/base/x" ]
     configs += [ "//build/config/linux:x11" ]
@@ skipping 551 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"
   }
 }