Making the AIDL GN target support multiple include directories.

chrome/android/webapk/libs/runtime_library/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")
 import("//chrome/android/webapk/libs/runtime_library_version.gni")
 
 # runtime_library_version.gni must be updated whenever the runtime library is
 # updated. The WebAPK re-extracts the runtime library from the Chrome APK when
 # |runtime_library_version| is incremented.
 
 # Whenever this constant is changed, WebApkUtils#getRuntimeDexName() must also
 # be changed.
 runtime_library_dex_asset_name = "webapk$runtime_library_version.dex"
 
 android_aidl("webapk_service_aidl") {
-  import_include = "src/org/chromium/webapk/lib/runtime_library"
+  import_include = [ "src/org/chromium/webapk/lib/runtime_library" ]
   interface_file = "src/org/chromium/webapk/lib/runtime_library/common.aidl"
   sources = [
     "src/org/chromium/webapk/lib/runtime_library/IWebApkApi.aidl",
   ]
 }
 
 # A standalone jar for the aidl's generated java files so that multiple places
 # can depend on the aidl.
 android_library("webapk_service_aidl_java") {
   srcjar_deps = [ ":webapk_service_aidl" ]
@@ skipping 35 matching lines @@
   java_files = [ "javatests/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImplTest.java" ]
   deps = [
     ":runtime_library_for_tests_java",
     ":webapk_service_aidl_java",
     "//base:base_java_test_support",
     "//chrome/test/android:chrome_java_test_support",
     "//content/public/test/android:content_java_test_support",
     "//third_party/android_support_test_runner:runner_java",
   ]
 }