Add CHECK to EnumerateDevices call in PepperDeviceManager

content/renderer/pepper/pepper_media_device_manager.cc

Index: content/renderer/pepper/pepper_media_device_manager.cc
diff --git a/content/renderer/pepper/pepper_media_device_manager.cc b/content/renderer/pepper/pepper_media_device_manager.cc
index 84e12b2e521d590a04d883e85781b7ca6cd42558..412c53f1be6e30a9c0875d75d994304942cbad9d 100644
--- a/content/renderer/pepper/pepper_media_device_manager.cc
+++ b/content/renderer/pepper/pepper_media_device_manager.cc
@@ -81,6 +81,7 @@ void PepperMediaDeviceManager::EnumerateDevices(
 #if defined(ENABLE_WEBRTC)
   bool request_audio_input = type == PP_DEVICETYPE_DEV_AUDIOCAPTURE;
   bool request_video_input = type == PP_DEVICETYPE_DEV_VIDEOCAPTURE;
+  CHECK(request_audio_input || request_video_input);
   GetMediaDevicesDispatcher()->EnumerateDevices(
       request_audio_input, request_video_input, false /* audio_output */,
       url::Origin(document_url.GetOrigin()),