Add an API to unpack Zip files directly from and to file descriptors.

chrome/common/zip_internal.h

Index: chrome/common/zip_internal.h
diff --git a/chrome/common/zip_internal.h b/chrome/common/zip_internal.h
index 3f750eac7c3e1c8091d6f7f761155d5f1f02a2ff..95359444f7f5e06384d83d9fd234cdbc5e09de54 100644
--- a/chrome/common/zip_internal.h
+++ b/chrome/common/zip_internal.h
@@ -20,6 +20,11 @@ namespace internal {
 // Windows.
 unzFile OpenForUnzipping(const std::string& file_name_utf8);
 
+#if defined(OS_POSIX)
+// Opens the file referred to by |zip_fd| for unzipping.
+unzFile OpenFdForUnzipping(const int zip_fd);

[satorux1, 2011/12/12 04:54:14]

const int -> int. We don't use 'const' for parameters of non-pointer/reference
types like int.

Note that you can use 'int' in the function declaration here, and 'const int' in
the function definition in .cc file, but we rarely do this.

[Jorge Lucangeli Obes, 2011/12/12 23:34:35]

Done.

+#endif
+
 // Opens the given file name in UTF-8 for zipping, with some setup for
 // Windows. |append_flag| will be passed to zipOpen2().
 zipFile OpenForZipping(const std::string& file_name_utf8, int append_flag);