Build NetError.java to use in java side tests by preprocessing net_errors.cc

net/net.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'linux_link_kerberos%': 0,
     'conditions': [
@@ skipping 2093 matching lines @@
         },
         {
           'target_name': 'net_java',
           'type': 'none',
           'variables': {
             'package_name': 'net',
             'java_in_dir': '../net/android/java',
           },
           'dependencies': [
             '../base/base.gyp:base',
+            'net_errors_java',
           ],
           'export_dependent_settings': [
             '../base/base.gyp:base',
           ],
           'includes': [ '../build/java.gypi' ],
         },
         {
           'target_name': 'net_javatests',
           'type': 'none',
           'variables': {
             'package_name': 'net_javatests',
             'java_in_dir': '../net/android/javatests',
           },
           'dependencies': [
             '../base/base.gyp:base',
             '../base/base.gyp:base_java_test_support',
             'net_java',
           ],
           'export_dependent_settings': [
             '../base/base.gyp:base',
             '../base/base.gyp:base_java_test_support',
             'net_java',
           ],
           'includes': [ '../build/java.gypi' ],
         },
+        {
+          # This should be extracted to a gypi file and parameterized if
+          # we have more use cases of using the preprocessor to build java files.
+          'target_name': 'net_errors_java',
+          'type': 'none',
+          'direct_dependent_settings': {
+            'variables': {
+              'additional_src_dirs': ['<(SHARED_INTERMEDIATE_DIR)/net/template/'],
+            },
+          },
+          'actions': [
+            {
+              'action_name': 'generate_net_errors_java',
+              'inputs': [
+                'android/java/net_errors_java.template',
+              ],
+              'outputs': [
+                '<(SHARED_INTERMEDIATE_DIR)/net/template/NetError.java',
+              ],
+              'action': [
+                'gcc',
+                '-x', 'c-header',
+                '-E', '-P',
+                '-I', '..',
+                '-o',
+                '<@(_outputs)',
+                '<@(_inputs)',
+              ],
+              'message': 'Preprocessing <(_inputs)',
+              'process_outputs_as_sources': 1,
+            },
+          ],
+        },
       ],
     }],
     # Special target to wrap a gtest_target_type==shared_library
     # net_unittests into an android apk for execution.
     # See base.gyp for TODO(jrg)s about this strategy.
     ['OS == "android" and gtest_target_type == "shared_library"', {
       'targets': [
         {
           'target_name': 'net_unittests_apk',
           'type': 'none',
@@ skipping 65 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'net_unittests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],
 }