media: No longer treat empty robustness differently on ChromeOS

components/cdm/renderer/widevine_key_system_properties.cc

Index: components/cdm/renderer/widevine_key_system_properties.cc
diff --git a/components/cdm/renderer/widevine_key_system_properties.cc b/components/cdm/renderer/widevine_key_system_properties.cc
index 47b7103b0443f54dc4e7793941775615461683ce..276f6238efa1348ffd7ce8be3789a0ee7390c316 100644
--- a/components/cdm/renderer/widevine_key_system_properties.cc
+++ b/components/cdm/renderer/widevine_key_system_properties.cc
@@ -119,17 +119,13 @@ EmeConfigRule WidevineKeySystemProperties::GetRobustnessConfigRule(
   }
 
 #if defined(OS_CHROMEOS)
-  // TODO(ddorwin): Remove this once we have confirmed it is not necessary.
-  // See https://crbug.com/482277
-  if (robustness == Robustness::EMPTY)
-    return EmeConfigRule::SUPPORTED;
-
   // Hardware security requires remote attestation.
   if (robustness >= Robustness::HW_SECURE_CRYPTO)
     return EmeConfigRule::IDENTIFIER_REQUIRED;
 
   // For video, recommend remote attestation if HW_SECURE_ALL is available,
-  // because it enables hardware accelerated decoding.
+  // regardless of the value of |robustness|, because it enables hardware
+  // accelerated decoding.
   // TODO(sandersd): Only do this when hardware accelerated decoding is
   // available for the requested codecs.
   if (media_type == EmeMediaType::VIDEO &&