Add create_density_splits option to java_apk.gypi / android_apk (gn)

build/android/package_resources_action.gypi

 # Copyright 2015 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 a helper to java_apk.gypi. It should be used to create an
 # action that runs ApkBuilder via ANT.
 #
 # Required variables:
 #  apk_name - File name (minus path & extension) of the output apk.
 #  android_manifest_path - Path to AndroidManifest.xml.
 #  app_manifest_version_name - set the apps 'human readable' version number.
 #  app_manifest_version_code - set the apps version number.
 # Optional variables:
 #  asset_location - The directory where assets are located (if any).
+#  create_density_splits - Whether to create density-based apk splits. Splits
+#    are supported only for minSdkVersion >= 21.
 #  resource_zips - List of paths to resource zip files.
 #  shared_resources - Make a resource package that can be loaded by a different
 #    application at runtime to access the package's resources.
 #  extensions_to_not_compress - E.g.: 'pak,dat,bin'
 #  extra_inputs - List of extra action inputs.
 {
   'variables': {
     'asset_location%': '',
+    'create_density_splits%': 0,
     'resource_zips%': [],
     'shared_resources%': 0,
     'extensions_to_not_compress%': '',
     'extra_inputs%': [],
     'resource_packaged_apk_name': '<(apk_name)-resources.ap_',
     'resource_packaged_apk_path': '<(intermediate_dir)/<(resource_packaged_apk_name)',
   },
   'action_name': 'package_resources_<(apk_name)',
   'message': 'packaging resources for <(apk_name)',
   'inputs': [
@@ skipping 21 matching lines @@
     ['shared_resources == 1', {
       'action': [
         '--shared-resources',
       ],
     }],
     ['asset_location != ""', {
       'action': [
         '--asset-dir', '<(asset_location)',
       ],
     }],
+    ['create_density_splits == 1', {
+      'action': [
+        '--create-density-splits',
+      ],
+      'outputs': [
+        '<(resource_packaged_apk_path)-hdpi',
+        '<(resource_packaged_apk_path)-xhdpi',
+        '<(resource_packaged_apk_path)-xxhdpi',
+        '<(resource_packaged_apk_path)-tvdpi',
+      ],
+    }],
     ['resource_zips != []', {
       'action': [
         '--resource-zips', '>(resource_zips)',
       ],
       'inputs': [
         '>@(resource_zips)',
       ],
     }],
   ],
 }