Never run errorprone on non-Chromium code.

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',
@@ skipping 64 matching lines @@
     'compile_stamp': '<(intermediate_dir)/compile.stamp',
     'lint_stamp': '<(intermediate_dir)/lint.stamp',
     'lint_result': '<(intermediate_dir)/lint_result.xml',
     'lint_config': '<(intermediate_dir)/lint_config.xml',
     'never_lint%': 0,
     'findbugs_stamp': '<(intermediate_dir)/findbugs.stamp',
     'run_findbugs%': 0,
     'java_in_dir_suffix%': '/src',
     'proguard_config%': '',
     'proguard_preprocess%': '0',
-    'enable_errorprone%': '0',
-    'errorprone_exe_path': '<(PRODUCT_DIR)/bin.java/chromium_errorprone',
     'variables': {
       'variables': {
         'proguard_preprocess%': 0,
         'emma_never_instrument%': 0,
       },
       'conditions': [
         ['proguard_preprocess == 1', {
           'javac_jar_path': '<(intermediate_dir)/<(_target_name).pre.jar'
         }, {
           'javac_jar_path': '<(jar_path)'
         }],
         ['chromium_code != 0 and emma_coverage != 0 and emma_never_instrument == 0', {
           'emma_instrument': 1,
         }, {
           'emma_instrument': 0,
         }],
       ],
     },
     'emma_instrument': '<(emma_instrument)',
     'javac_jar_path': '<(javac_jar_path)',
+    'conditions': [
+      ['chromium_code == 0', {
+        'enable_errorprone': 0,
+      }],
+    ],
+    'enable_errorprone%': 0,
+    'errorprone_exe_path': '<(PRODUCT_DIR)/bin.java/chromium_errorprone',
   },
   'conditions': [
     ['add_to_dependents_classpaths == 1', {
       # This all_dependent_settings is used for java targets only. This will add the
       # jar path to the classpath of dependent java targets.
       'all_dependent_settings': {
         'variables': {
           'input_jars_paths': ['<(jar_final_path)'],
           'library_dexed_jars_paths': ['<(dex_path)'],
         },
@@ skipping 254 matching lines @@
             'dex_no_locals': 1,
           }],
         ],
         'dex_input_paths': [ '<(jar_final_path)' ],
         'output_path': '<(dex_path)',
       },
       'includes': [ 'android/dex_action.gypi' ],
     },
   ],
 }