Pass android_sdk as a variable to gyp

build/java_aidl.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 Java aidl files in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'aidl_aidl-file-name',
 #   'type': 'none',
 #   'variables': {
 #     'aidl_interface_file': 'path/to/aidl/interface/file/aidl-file',
 #   },
 #   'sources': {
 #     'path/to/aidl/source/file/1.aidl',
 #     'path/to/aidl/source/file/2.aidl',
 #     ...
 #   },
 #   'includes': ['path/to/this/gypi/file'],
 # }
 #
 #
 # Finally, the generated java file will be in the following directory:
 #   <(PRODUCT_DIR)/lib.java/
 
 {
-  'variables': {
-    'android_sdk%':
-      '<!(if [ -z $ANDROID_BUILD_TOP ]; then \
-            /bin/echo -n $ANDROID_SDK_ROOT/platforms/android-${ANDROID_SDK_VERSION} ; \
-          else /bin/echo -n \
-            $ANDROID_SDK_ROOT ; \
-          fi)',
-  },
   'rules': [
     {
       'rule_name': 'compile_aidl',
       'extension': 'aidl',
       'inputs': [
         '<(android_sdk)/framework.aidl',
         '<(aidl_interface_file)',
       ],
       'outputs': [
         '<(PRODUCT_DIR)/lib.java/<(RULE_INPUT_ROOT).java',
       ],
       'action': [
         'aidl',
         '-p<(android_sdk)/framework.aidl',
         '-p<(aidl_interface_file)',
         '-o<(PRODUCT_DIR)/lib.java/',
         '<(RULE_INPUT_PATH)',
       ],
     },
   ],
 }