Revert "EME: Fail requestMediaKeySystemAccess if no capabilities specified"

media/blink/key_system_config_selector.cc

Index: media/blink/key_system_config_selector.cc
diff --git a/media/blink/key_system_config_selector.cc b/media/blink/key_system_config_selector.cc
index 57998696127b922bcb7bc8ffda611e29826626cf..f6deabec94c6633daef988fdbe448646765122bc 100644
--- a/media/blink/key_system_config_selector.cc
+++ b/media/blink/key_system_config_selector.cc
@@ -650,10 +650,8 @@ KeySystemConfigSelector::GetSupportedConfiguration(
 
   // 15. If the videoCapabilities and audioCapabilities members in candidate
   //     configuration are both empty, return NotSupported.
-  if (candidate.videoCapabilities.isEmpty() &&
-      candidate.audioCapabilities.isEmpty()) {
-    return CONFIGURATION_NOT_SUPPORTED;
-  }
+  // TODO(jrummell): Enforce this once the deprecation warning is removed.
+  // See http://crbug.com/616233.
 
   // 16. If the videoCapabilities member in candidate configuration is
   //     non-empty: