Refactoring: Merge VideoSenderConfig and AudioSenderConfig.

media/cast/test/utility/default_config.h

Index: media/cast/test/utility/default_config.h
diff --git a/media/cast/test/utility/default_config.h b/media/cast/test/utility/default_config.h
index 2cc52a7a72992b84340a4d0a2b7a959c368c61c0..0357a97338b0e8fc9dfd29fe360a73e82322efdf 100644
--- a/media/cast/test/utility/default_config.h
+++ b/media/cast/test/utility/default_config.h
@@ -20,14 +20,14 @@ FrameReceiverConfig GetDefaultAudioReceiverConfig();
 // name.
 FrameReceiverConfig GetDefaultVideoReceiverConfig();
 
-// Returns a AudioSenderConfig initialized to default values. This means
+// Returns a FrameSenderConfig initialized to default values. This means
 // 48 kHz, 2-channel Opus-coded audio. Default values for SSRCs and payload
 // type.
-AudioSenderConfig GetDefaultAudioSenderConfig();
+FrameSenderConfig GetDefaultAudioSenderConfig();
 
-// Returns a VideoSenderConfig initialized to default values. This means
+// Returns a FrameSenderConfig initialized to default values. This means
 // 30 Hz VP8 coded code. Default values for SSRCs and payload type.
-VideoSenderConfig GetDefaultVideoSenderConfig();
+FrameSenderConfig GetDefaultVideoSenderConfig();
 
 // Returns a callback that does nothing.
 CreateVideoEncodeAcceleratorCallback