GN(android): Add scripts & runtime logic for installing _managed apks

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.
 
 import("//build/config/android/config.gni")
 
 assert(is_android)
 
 rebased_android_sdk = rebase_path(android_sdk, root_build_dir)
 rebased_android_sdk_root = rebase_path(android_sdk_root, root_build_dir)
@@ skipping 1149 matching lines @@
   if (defined(invoker.srcjar_deps)) {
     _srcjar_deps = invoker.srcjar_deps
   }
 
   _srcjars = []
   if (defined(invoker.srcjars)) {
     _srcjars = invoker.srcjars
   }
 
   _java_files = []
-  if (defined(invoker.java_files)) {
-    _java_files = invoker.java_files
-  } else if (defined(invoker.DEPRECATED_java_in_dir)) {
+  if (defined(invoker.DEPRECATED_java_in_dir)) {
     _src_dir = invoker.DEPRECATED_java_in_dir + "/src"
     _src_dir_exists = exec_script("//build/dir_exists.py",
                                   [ rebase_path(_src_dir, root_build_dir) ],
                                   "string")
     assert(_src_dir_exists == "False",
            "In GN, java_in_dir should be the fully specified java directory " +
                "(i.e. including the trailing \"/src\")")
 
-    _java_files_build_rel = exec_script(
-            "//build/android/gyp/find.py",
-            [
-              "--pattern",
-              "*.java",
-              rebase_path(invoker.DEPRECATED_java_in_dir, root_build_dir),
-            ],
-            "list lines")
+    _java_files_build_rel =
+        exec_script("//build/android/gyp/find.py",
+                    [
+                      "--pattern",
+                      "*.java",
+                      rebase_path(invoker.DEPRECATED_java_in_dir,
+                                  root_build_dir),
+                    ],
+                    "list lines")
     _java_files = rebase_path(_java_files_build_rel, ".", root_build_dir)
   }
+  if (defined(invoker.java_files)) {
+    _java_files += invoker.java_files
+  }
   assert(_java_files != [] || _srcjar_deps != [] || _srcjars != [])
 
   _compile_java_target = "${_template_name}__compile_java"
   _final_deps += [ ":$_compile_java_target" ]
   compile_java(_compile_java_target) {
     forward_variables_from(invoker,
                            [
                              "dist_jar_path",
                              "enable_errorprone",
                              "jar_excluded_patterns",
@@ skipping 376 matching lines @@
     ]
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--script-output-path",
       rebase_path(generated_script, root_build_dir),
     ]
     args += test_runner_args
   }
 }