update_engine: Run clang-format on payload_consumer

We just did a AOSP merge, so it is a good time to clean things up.

BUG=none
TEST=unittest

Change-Id: I4fe9cef5eb8709344d6b78bc298c0f1c03308ffc
Reviewed-on: https://chromium-review.googlesource.com/1407540
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
Reviewed-by: Xiaochu Liu <xiaochu@chromium.org>
diff --git a/payload_consumer/xz_extent_writer.cc b/payload_consumer/xz_extent_writer.cc
index 835dcf7..a5b939d 100644
--- a/payload_consumer/xz_extent_writer.cc
+++ b/payload_consumer/xz_extent_writer.cc
@@ -32,7 +32,9 @@
 const uint32_t kXzMaxDictSize = 64 * 1024 * 1024;
 
 const char* XzErrorString(enum xz_ret error) {
-  #define __XZ_ERROR_STRING_CASE(code) case code: return #code;
+#define __XZ_ERROR_STRING_CASE(code) \
+  case code:                         \
+    return #code;
   switch (error) {
     __XZ_ERROR_STRING_CASE(XZ_OK)
     __XZ_ERROR_STRING_CASE(XZ_STREAM_END)
@@ -46,7 +48,7 @@
     default:
       return "<unknown xz error>";
   }
-  #undef __XZ_ERROR_STRING_CASE
+#undef __XZ_ERROR_STRING_CASE
 }
 }  // namespace