Android: Add java files from android_apk targets

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.
 
 # 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/config/android/config.gni")
 import("//build/config/android/internal_rules.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/dcheck_always_on.gni")
@@ skipping 1415 matching lines @@
     assert(defined(invoker.android_manifest))
     gen_dir = "$target_gen_dir/$target_name"
     base_path = "$gen_dir/$target_name"
     _build_config = "$target_gen_dir/$target_name.build_config"
     resources_zip_path = "$base_path.resources.zip"
     _all_resources_zip_path = "$base_path.resources.all.zip"
     _jar_path = "$base_path.jar"
     _lib_dex_path = "$base_path.dex.jar"
     _rebased_lib_dex_path = rebase_path(_lib_dex_path, root_build_dir)
     _template_name = target_name
+    if (defined(invoker.java_files)) {
+      java_sources_file = "$base_path.sources"

[agrieve, 2016/12/06 20:25:59]

nit: Please make this _java_sources_file and explicitly pass it to
write_build_config and java_libarary_impl(). Otherwise it's really hard to
figure out the data flow.

[Peter Wen, 2016/12/06 22:05:45]

Done

+    }
 
     enable_multidex =
         defined(invoker.enable_multidex) && invoker.enable_multidex
     if (enable_multidex) {
       final_dex_path = "$gen_dir/classes.dex.zip"
     } else {
       final_dex_path = "$gen_dir/classes.dex"
     }
     final_dex_target_name = "${_template_name}__final_dex"
 
@@ skipping 1326 matching lines @@
         # because in practice they seem to contain classes required to be in the
         # classpath.
         deps += _subjar_targets
       }
       if (defined(_res_target_name)) {
         deps += [ ":$_res_target_name" ]
       }
     }
   }
 }