android: Do not pass source_dir to package_apk.

build/java_apk.gypi

 # Copyright (c) 2012 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.
 
 # This file is meant to be included into a target to provide a rule
 # to build Android APKs in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my_package_apk',
@@ skipping 90 matching lines @@
     'obfuscated_jar_path': '<(intermediate_dir)/obfuscated.jar',
     'dex_path': '<(intermediate_dir)/classes.dex',
     'emma_device_jar': '<(android_sdk_root)/tools/lib/emma_device.jar',
     'android_manifest_path%': '<(java_in_dir)/AndroidManifest.xml',
     'push_stamp': '<(intermediate_dir)/push.stamp',
     'link_stamp': '<(intermediate_dir)/link.stamp',
     'package_resources_stamp': '<(intermediate_dir)/package_resources.stamp',
     'unsigned_apk_path': '<(intermediate_dir)/<(apk_name)-unsigned.apk',
     'final_apk_path%': '<(PRODUCT_DIR)/apks/<(apk_name).apk',
     'incomplete_apk_path': '<(intermediate_dir)/<(apk_name)-incomplete.apk',
-    'source_dir': '<(java_in_dir)/src',
     'apk_install_record': '<(intermediate_dir)/apk_install.record.stamp',
     'device_intermediate_dir': '/data/local/tmp/chromium/<(_target_name)/<(CONFIGURATION_NAME)',
     'symlink_script_host_path': '<(intermediate_dir)/create_symlinks.sh',
     'symlink_script_device_path': '<(device_intermediate_dir)/create_symlinks.sh',
     'create_standalone_apk%': 1,
     'variables': {
       'variables': {
         'native_lib_target%': '',
         'native_lib_version_name%': '',
         'use_chromium_linker%' : 0,
@@ skipping 628 matching lines @@
       ],
       'action': [
         'python', '<(DEPTH)/build/android/gyp/ant.py',
         '-quiet',
         '-DANDROID_SDK_ROOT=<(android_sdk_root)',
         '-DANDROID_SDK_TOOLS=<(android_sdk_tools)',
         '-DAPK_NAME=<(apk_name)',
         '-DCONFIGURATION_NAME=<(CONFIGURATION_NAME)',
         '-DNATIVE_LIBS_DIR=<(apk_package_native_libs_dir)',
         '-DOUT_DIR=<(intermediate_dir)',
-        '-DSOURCE_DIR=<(source_dir)',
         '-DUNSIGNED_APK_PATH=<(unsigned_apk_path)',
         '-DEMMA_INSTRUMENT=<(emma_instrument)',
         '-DEMMA_DEVICE_JAR=<(emma_device_jar)',
 
         '-Dbasedir=.',
         '-buildfile',
         '<(DEPTH)/build/android/ant/apk-package.xml',
       ]
     },
   ],
 }