Setup download internal directory

base/android/path_utils.h

Index: base/android/path_utils.h
diff --git a/base/android/path_utils.h b/base/android/path_utils.h
index 7402644c1c252778ece6fb420203948278d48592..4fbc0c35a24ce18b896f0439c97efed1555194d1 100644
--- a/base/android/path_utils.h
+++ b/base/android/path_utils.h
@@ -35,6 +35,10 @@ BASE_EXPORT bool GetCacheDirectory(FilePath* result);
 // in the FilePath pointed to by 'result'.
 BASE_EXPORT bool GetThumbnailCacheDirectory(FilePath* result);
 
+// Retrieves the path to the downloads internal directory. The result is placed
+// in the FilePath pointed to by 'result'.
+BASE_EXPORT bool GetDownloadInternalDirectory(FilePath* result);
+
 // Retrieves the path to the public downloads directory. The result is placed
 // in the FilePath pointed to by 'result'.
 BASE_EXPORT bool GetDownloadsDirectory(FilePath* result);