DO NOT SUBMIT: add main dex list check to classloader.

build/config/android/internal_rules.gni

Index: build/config/android/internal_rules.gni
diff --git a/build/config/android/internal_rules.gni b/build/config/android/internal_rules.gni
index 3f592bde50d8defe23865700d345bd55cf176142..15033df7ccb75b90dcd41581ef422e25d4acf874 100644
--- a/build/config/android/internal_rules.gni
+++ b/build/config/android/internal_rules.gni
@@ -928,6 +928,11 @@ if (enable_java_templates) {
     if (_enable_multidex) {
       _main_dex_list_path = invoker.output + ".main_dex_list"
       _main_dex_list_target_name = "${target_name}__main_dex_list"
+      _gen_main_dex_java_list = false
+      if (defined(invoker.list_output)) {
+        _gen_main_dex_java_list = true
+        _main_dex_list_path_java = invoker.list_output
+      }
       action(_main_dex_list_target_name) {
         forward_variables_from(invoker,
                                [
@@ -980,6 +985,13 @@ if (enable_java_templates) {
             rebase_path(invoker.extra_main_dex_proguard_config, root_build_dir),
           ]
         }
+        if (_gen_main_dex_java_list) {
+          outputs += [ _main_dex_list_path_java ]
+          args += [
+            "--main-dex-list-path-java",
+            rebase_path(_main_dex_list_path_java, root_build_dir),
+          ]
+        }
 
         if (defined(invoker.args)) {
           args += invoker.args