Make java.gypi export jar path to input_jars_paths variable

build/java.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 in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my-package_java',
 #   'type': 'none',
 #   'variables': {
 #     'package_name': 'my-package',
 #     'java_in_dir': 'path/to/package/root',
 #   },
 #   'includes': ['path/to/this/gypi/file'],
 # }
 #
 # Note that this assumes that there's ant buildfile with package_name in
 # java_in_dir. So if if you have package_name="base" and
 # java_in_dir="base/android/java" you should have a directory structure like:
 #
 # base/android/java/base.xml
 # base/android/java/org/chromium/base/Foo.java
 # base/android/java/org/chromium/base/Bar.java
 #
 # Finally, the generated jar-file will be:
 #   <(PRODUCT_DIR)/lib.java/chromium_base.jar
-#
-# TODO(yfriedman): The "finally" statement isn't entirely true yet, as we don't
-# auto-generate the ant file yet.
 
 {
+  'direct_dependent_settings': {
+    'variables': {
+      'input_jars_paths': ['<(PRODUCT_DIR)/lib.java/chromium_<(package_name).jar'],
+    },
+  },
+  'variables': {
+    'input_jars_paths': [],
+  },
   'actions': [
     {
       'action_name': 'ant_<(package_name)',
       'message': 'Building <(package_name) java sources.',
       'inputs': [
-         '<(java_in_dir)/<(package_name).xml',
-         '<!@(find <(java_in_dir) -name "*.java")'
+        'android/ant/common.xml',
+        'android/ant/chromium-jars.xml',
+        '<(java_in_dir)/<(package_name).xml',
+        '<!@(find <(java_in_dir) -name "*.java")',
+        '>@(input_jars_paths)',
       ],
       'outputs': [
         '<(PRODUCT_DIR)/lib.java/chromium_<(package_name).jar',
       ],
       'action': [
         'ant',
         '-DPRODUCT_DIR=<(ant_build_out)',
         '-DPACKAGE_NAME=<(package_name)',
         '-DANDROID_SDK=<(android_sdk)',
         '-DANDROID_SDK_ROOT=<(android_sdk_root)',
         '-DANDROID_SDK_TOOLS=<(android_sdk_tools)',
         '-DANDROID_SDK_VERSION=<(android_sdk_version)',
         '-DANDROID_TOOLCHAIN=<(android_toolchain)',
         '-buildfile',
         '<(java_in_dir)/<(package_name).xml',
       ]
     },
   ],
 }