Extract apkbuilder build action into a .gypi

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 516 matching lines @@
     }
   }
 
   action("${target_name}__package") {
     script = "//build/android/gyp/ant.py"
     _ant_script = "//build/android/ant/apk-package.xml"
 
     depfile = "$target_gen_dir/$target_name.d"
 
     inputs = [
-      _dex_path,
       _resource_packaged_apk_path,
       _ant_script,
     ]
+    if (defined(_dex_path)) {
+      inputs += [ _dex_path ]
+    }
 
     outputs = [
       depfile,
       _packaged_apk_path,
     ]
 
     _rebased_emma_jar = ""
     _rebased_resource_packaged_apk_path =
         rebase_path(_resource_packaged_apk_path, root_build_dir)
     _rebased_packaged_apk_path = rebase_path(_packaged_apk_path, root_build_dir)
     _rebased_native_libs_dir = rebase_path(_native_libs_dir, root_build_dir)
-    _rebased_dex_path = rebase_path(_dex_path, root_build_dir)
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--",
       "-quiet",
       "-DANDROID_SDK_ROOT=$rebased_android_sdk_root",
       "-DANDROID_SDK_TOOLS=$rebased_android_sdk_build_tools",
       "-DRESOURCE_PACKAGED_APK_NAME=$_rebased_resource_packaged_apk_path",
       "-DCONFIGURATION_NAME=$_configuration_name",
       "-DNATIVE_LIBS_DIR=$_rebased_native_libs_dir",
       "-DOUT_DIR=",
       "-DUNSIGNED_APK_PATH=$_rebased_packaged_apk_path",
       "-DEMMA_INSTRUMENT=0",
       "-DEMMA_DEVICE_JAR=$_rebased_emma_jar",
-      "-DDEX_FILE_PATH=$_rebased_dex_path",
       "-Dbasedir=.",
       "-buildfile",
       rebase_path(_ant_script, root_build_dir),
     ]
+    if (defined(_dex_path)) {
+      _rebased_dex_path = rebase_path(_dex_path, root_build_dir)
+      args += [
+        "-DDEX_FILE_PATH=$_rebased_dex_path",
+        "-DHAS_CODE=true",
+      ]
+    } else {
+      args += [ "-DHAS_CODE=false" ]
+    }
   }
 
   action("${target_name}__finalize") {
     script = "//build/android/gyp/finalize_apk.py"
     depfile = "$target_gen_dir/$target_name.d"
 
     sources = [
       _packaged_apk_path,
     ]
     inputs = [
@@ skipping 639 matching lines @@
     outputs = [
       depfile,
       invoker.out_manifest,
     ]
     inputs = [
       invoker.main_manifest,
     ]
     args = _args
   }
 }