Sandbox the component updater's patcher utility process.

courgette/third_party/bsdiff/bsdiff.h

Index: courgette/third_party/bsdiff/bsdiff.h
diff --git a/courgette/third_party/bsdiff/bsdiff.h b/courgette/third_party/bsdiff/bsdiff.h
index a5da4ec9dd130d267868af0d546f1ed5426f73ca..4914053e80d28fa9c7d03f929a5cbd5971bd66c6 100644
--- a/courgette/third_party/bsdiff/bsdiff.h
+++ b/courgette/third_party/bsdiff/bsdiff.h
@@ -44,6 +44,7 @@
 
 #include <stdint.h>
 
+#include "base/files/file.h"
 #include "base/files/file_util.h"
 
 namespace courgette {
@@ -81,6 +82,11 @@ BSDiffStatus ApplyBinaryPatch(const base::FilePath& old_stream,
                               const base::FilePath& patch_stream,
                               const base::FilePath& new_stream);
 
+// As above, but simply takes base::Files.
+BSDiffStatus ApplyBinaryPatch(base::File old_stream,

[huangs, 2016/12/06 19:40:07]

Order not changed?

[waffles, 2016/12/06 19:46:22]

Sorry, I really thought I did that...
Done now.

+                              base::File patch_stream,
+                              base::File new_stream);
+
 // The following declarations are common to the patch-creation and
 // patch-application code.