chromeos: Make dbus::MessageReader memory ownership explicit

chromeos/dbus/debug_daemon_client.cc

Index: chromeos/dbus/debug_daemon_client.cc
diff --git a/chromeos/dbus/debug_daemon_client.cc b/chromeos/dbus/debug_daemon_client.cc
index 9d06e5f721003de08cbca3428d8f33965f30a0a8..25a55e331f75946d92088a2da819e140743e3329 100644
--- a/chromeos/dbus/debug_daemon_client.cc
+++ b/chromeos/dbus/debug_daemon_client.cc
@@ -514,12 +514,10 @@ class DebugDaemonClientImpl : public DebugDaemonClient {
     }
 
     dbus::MessageReader reader(response);
-    uint8* buffer = NULL;
+    const uint8* buffer = NULL;
     size_t buf_size = 0;
-    if (!reader.PopArrayOfBytes(reinterpret_cast<uint8**>(
-        &buffer), &buf_size)) {
+    if (!reader.PopArrayOfBytes(&buffer, &buf_size))
       return;
-    }
 
     // TODO(asharif): Figure out a way to avoid this copy.
     data.insert(data.end(), buffer, buffer + buf_size);