Android: factor out use of SDK jar.

build/jar_file_jni_generator.gypi

Index: build/jar_file_jni_generator.gypi
diff --git a/build/jar_file_jni_generator.gypi b/build/jar_file_jni_generator.gypi
index 3a2447ec3cd323852d5a9706fa91dd84b3986308..dc02f25bca20df5f13588bb7044bfc5c4e7f88fc 100644
--- a/build/jar_file_jni_generator.gypi
+++ b/build/jar_file_jni_generator.gypi
@@ -12,7 +12,6 @@
 #   'variables': {
 #     'jni_gen_package': 'chrome',
 #     'input_java_class': 'java/io/InputStream.class',
-#     'input_jar_file': '<(android_sdk)/android.jar',
 #   },
 #   'includes': [ '../build/jar_file_jni_generator.gypi' ],
 # },
@@ -26,7 +25,7 @@
       'action_name': 'generate_jni_headers_from_jar_file',
       'inputs': [
         '<(jni_generator)',
-        '<(input_jar_file)',
+        '<(android_sdk_jar)',
       ],
       'variables': {
         'java_class_name': '<!(basename <(input_java_class)|sed "s/\.class//")'
@@ -37,7 +36,7 @@
       'action': [
         '<(jni_generator)',
         '-j',
-        '<(input_jar_file)',
+        '<(android_sdk_jar)',
         '--input_file',
         '<(input_java_class)',
         '--output_dir',
@@ -45,7 +44,7 @@
         '--optimize_generation',
         '<(optimize_jni_generation)',
       ],
-      'message': 'Generating JNI bindings from  <(input_jar_file)/<(input_java_class)',
+      'message': 'Generating JNI bindings from  <(android_sdk_jar)/<(input_java_class)',
       'process_outputs_as_sources': 1,
     },
   ],