Upstream Android's PathUtils implementation.

base/base.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,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 97 matching lines @@
       },
       'defines': [
         'NACL_WIN64',
       ],
       # TODO(rvargas): Bug 78117. Remove this.
       'msvs_disabled_warnings': [
         4244,
       ],
     },
     {
+      'target_name': 'base_jni_headers',
+      'type': 'none',
+      'actions': [
+        {
+          'action_name': 'generate_jni_headers',

[Nico, 2012/04/03 18:51:05]

This isn't done conditionally, so a `make all` creates jni headers even when not
building for android. It seems to be fairly fast so maybe that's ok, but it's a
bit surprising.

+          'inputs': [
+            'android/jni_generator/jni_generator.py',
+            'android/java/org/chromium/base/PathUtils.java',
+          ],
+          'outputs': [
+            '<(SHARED_INTERMEDIATE_DIR)/base/jni/path_utils_jni.h',
+          ],
+          'action': [
+            'python',
+            'android/jni_generator/jni_generator.py',
+            '-o',
+            '<@(_inputs)',

[Mark Mentovai, 2012/03/13 20:16:21]

Do you really want to pass jni_generator.py back into jni_generator.py?

[Peter Beverloo, 2012/03/13 20:18:50]

As answered in PS3, per bulach@ this indeed is the way to invoke the generator.
I agree that it's odd, and will address this while looking at using a template
instead of bare actions.

+            '<@(_outputs)',
+          ],
+        }
+      ],
+    },
+    {
       'target_name': 'base_unittests',
       'type': 'executable',
       'sources': [
         # Infrastructure files.
         'test/run_all_unittests.cc',
 
         # Tests.
         'android/jni_android_unittest.cc',
         'android/scoped_java_ref_unittest.cc',
         'at_exit_unittest.cc',
@@ skipping 486 matching lines @@
              # treated as weak imports in dependents, who still must
              # #include closure_blocks_leopard_compat.h to get weak imports.
              'type': 'none',
            }],
          ],
        },
      ],
    }],
   ],
 }