Create xxxhdpi density splits when density splits are enabled

build/config/android/internal_rules.gni

 # 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/config/android/config.gni")
 
 assert(is_android)
 
 rebased_android_sdk = rebase_path(android_sdk, root_build_dir)
 rebased_android_sdk_root = rebase_path(android_sdk_root, root_build_dir)
@@ skipping 600 matching lines @@
     _configuration_name = "Debug"
   }
 
   _create_density_splits =
       defined(invoker.create_density_splits) && invoker.create_density_splits
   if (_create_density_splits) {
     _split_densities = [
       "hdpi",
       "xhdpi",
       "xxhdpi",
+      "xxxhdpi",
       "tvdpi",
     ]
   }
 
   _package_resources_target_name = "${target_name}__package_resources"
   action(_package_resources_target_name) {
     deps = _package_deps
 
     script = "//build/android/gyp/package_resources.py"
     depfile = "${target_gen_dir}/${target_name}.d"
@@ skipping 885 matching lines @@
     ]
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--script-output-path",
       rebase_path(generated_script, root_build_dir),
     ]
     args += test_runner_args
   }
 }