Upstream: DexOptimizer and DexLoader classes

chrome/android/webapk/libs/client/BUILD.gn

 # Copyright 2016 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/rules.gni")
 
 android_library("client") {
-  java_files = [ "src/org/chromium/webapk/lib/client/WebApkValidator.java" ]
+  java_files = [
+    "src/org/chromium/webapk/lib/client/DexOptimizer.java",
+    "src/org/chromium/webapk/lib/client/WebApkValidator.java",
+  ]
   deps = [
+    "//base:base_java",
     "//chrome/android/webapk/libs/common",
   ]
 }
 
 junit_binary("webapk_client_junit_tests") {
   java_files =
       [ "junit/src/org/chromium/webapk/lib/client/WebApkValidatorTest.java" ]
   deps = [
     ":client",
     "//base:base_junit_test_support",
   ]
 }