Upstream Android's PathUtils implementation.

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index 8e0aed51f94be974a4fdfe3e469e11621fd1599d..052fbf94043bac56c9763b0c39ccc5f906ef2df6 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -485,8 +485,6 @@
               ['include', '^worker_pool_linux\\.cc$'],
               # TODO(michaelbai): The below files are excluded because of the
               # missing JNI, add them back when JNI is ready.
-              ['exclude', '^android/path_utils\\.cc$'],
-              ['exclude', '^base_paths_android\\.cc$'],
               ['exclude', '^message_pump_android\\.cc$'],
             ],
           }],
@@ -664,6 +662,10 @@
           'dependencies': [
             'symbolize',
             '../third_party/ashmem/ashmem.gyp:ashmem',
+            'base_jni_headers',
+          ],
+          'include_dirs': [
+            '<(SHARED_INTERMEDIATE_DIR)/base',
           ],
           'link_settings': {
             'libraries': [