GN: Remove asset_location parameter in favour of android_assets()

build/config/android/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("//base/android/linker/config.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/internal_rules.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/toolchain.gni")
 import("//third_party/android_platform/config.gni")
@@ skipping 1651 matching lines @@
   }
   if (defined(invoker.loadable_modules) && invoker.loadable_modules != []) {
     _extra_native_libs_even_when_incremental += invoker.loadable_modules
   }
 
   _final_deps += [ ":${_template_name}__create" ]
   create_apk("${_template_name}__create") {
     deps = []
     forward_variables_from(invoker,
                            [
-                             "asset_location",
                              "deps",
                              "extensions_to_not_compress",
                              "language_splits",
                              "public_deps",
                              "shared_resources",
                              "write_asset_list",
                            ])
     apk_path = _final_apk_path
     android_manifest = _android_manifest
     assets_build_config = _build_config
@@ skipping 553 matching lines @@
   }
 
   android_library(target_name) {
     java_files = []
     srcjar_deps = [ ":${_template_name}__protoc_java" ]
     deps = [
       "//third_party/android_protobuf:protobuf_nano_javalib",
     ]
   }
 }