update_engine: puffdiff .zvoice files

.zvoice files in speech_synthesis are large zip files. Start using puffin on
them to reduce the payload size whenever they change.

BUG=none
TEST=unittests
TEST=brillo_update_payload

Change-Id: Ib8ec31af831e44aa6bec3c024235728bd2d6aec5
Reviewed-on: https://chromium-review.googlesource.com/986736
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Nicolas Norvez <norvez@chromium.org>

1 files changed, 9 insertions, 5 deletions

diff --git a/payload_generator/deflate_utils.cc b/payload_generator/deflate_utils.cc
index e3311427..2719048c 100644
--- a/payload_generator/deflate_utils.cc
+++ b/payload_generator/deflate_utils.cc
@@ -287,12 +287,16 @@ bool PreprocessParitionFiles(const PartitionConfig& part,
     }
 
     // Search for deflates if the file is in zip format.
+    // .zvoice files may eventually move out of rootfs. If that happens, remove
+    // ".zvoice" (crbug.com/782918).
+    const string zip_file_extensions[] = {".apk", ".zip", ".jar", ".zvoice"};
     bool is_zip =
-        base::EndsWith(
-            file.name, ".apk", base::CompareCase::INSENSITIVE_ASCII) ||
-        base::EndsWith(
-            file.name, ".zip", base::CompareCase::INSENSITIVE_ASCII) ||
-        base::EndsWith(file.name, ".jar", base::CompareCase::INSENSITIVE_ASCII);
+        any_of(zip_file_extensions,
+               std::end(zip_file_extensions),
+               [&file](const string& ext) {
+                 return base::EndsWith(
+                     file.name, ext, base::CompareCase::INSENSITIVE_ASCII);
+               });
 
     if (is_zip && extract_deflates) {
       brillo::Blob data;