Revert "libmojo: Uprev the library to r456626 from Chromium"

This reverts commit 8ac9103e05b66812c25348943383f9365d1ce3e0.

Reason for revert: Broke the mac_sdk
Exempt-From-Owner-Approval: Fixing mac_sdk

Change-Id: I0b74d1abaa66933a93fd6f82ff018e8948c1204e
diff --git a/base/android/path_utils.h b/base/android/path_utils.h
index 7402644..6501f1b 100644
--- a/base/android/path_utils.h
+++ b/base/android/path_utils.h
@@ -48,6 +48,8 @@
 // is placed in the FilePath pointed to by 'result'.
 BASE_EXPORT bool GetExternalStorageDirectory(FilePath* result);
 
+bool RegisterPathUtils(JNIEnv* env);
+
 }  // namespace android
 }  // namespace base