Fix compile error on x86-generic (32-bit) PFQ bots.

chrome/browser/chromeos/audio/audio_devices_pref_handler_impl.cc

Index: chrome/browser/chromeos/audio/audio_devices_pref_handler_impl.cc
diff --git a/chrome/browser/chromeos/audio/audio_devices_pref_handler_impl.cc b/chrome/browser/chromeos/audio/audio_devices_pref_handler_impl.cc
index 6c35536e7464333ba542b51c1f7eadcbca387582..b43afdbcc0707670b83df13fb237fb298d420648 100644
--- a/chrome/browser/chromeos/audio/audio_devices_pref_handler_impl.cc
+++ b/chrome/browser/chromeos/audio/audio_devices_pref_handler_impl.cc
@@ -22,7 +22,7 @@ namespace {
 
 std::string GetDeviceIdString(const chromeos::AudioDevice& device) {
   return device.display_name + " : " +
-         base::Uint64ToString((device.id & ((1ULL << 32) - 1)));
+         base::Uint64ToString(device.id & static_cast<uint64>(0xffffffff));
 }
 
 }