Plumb bootclasspath GN -> Android Studio

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.
 
 # Do not add any imports to non-//build directories here.
 # Some projects (e.g. V8) do not have non-build directories DEPS'ed in.
 import("//build_overrides/build.gni")
 import("//build/config/android/config.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/sanitizers/sanitizers.gni")
@@ skipping 335 matching lines @@
     if (defined(invoker.gradle_treat_as_prebuilt) &&
         invoker.gradle_treat_as_prebuilt) {
       args += [ "--gradle-treat-as-prebuilt" ]
     }
     if (defined(invoker.main_class)) {
       args += [
         "--main-class",
         invoker.main_class,
       ]
     }
+    if (defined(invoker.alternative_android_sdk_ijar)) {
+      args += [
+        "--bootclasspath",
+        rebase_path(invoker.alternative_android_sdk_ijar, root_build_dir),
+      ]
+    }
     if (current_toolchain != default_toolchain) {
       # This has to be a built-time error rather than a GN assert because many
       # packages have a mix of java and non-java targets. For example, the
       # following would fail even though nothing depends on :bar(//baz):
       #
       # shared_library("foo") {
       # }
       #
       # android_library("bar") {
       #   deps = [ ":foo(//baz)" ]
@@ skipping 1934 matching lines @@
     # build the _build_config.
     if (defined(invoker.override_build_config)) {
       _build_config = invoker.override_build_config
     } else {
       _build_config = _base_path + ".build_config"
       build_config_target_name = "${_template_name}__build_config"
 
       write_build_config(build_config_target_name) {
         forward_variables_from(invoker,
                                [
+                                 "alternative_android_sdk_ijar",
                                  "gradle_treat_as_prebuilt",
                                  "input_jars_paths",
                                  "main_class",
                                  "proguard_configs",
                                ])
         if (defined(invoker.is_java_binary) && invoker.is_java_binary) {
           type = "java_binary"
         } else {
           type = "java_library"
         }
@@ skipping 447 matching lines @@
         rebase_path(root_build_dir, root_build_dir),
         "--packed-libraries-dir",
         rebase_path(_packed_libraries_dir, root_build_dir),
         "--libraries=${invoker.libraries_filearg}",
         "--filelistjson",
         rebase_path(invoker.file_list_json, root_build_dir),
       ]
     }
   }
 }