iOS: Add ability to specify audio constraints.

webrtc/sdk/objc/Framework/Classes/RTCMediaSource+Private.h

Index: webrtc/sdk/objc/Framework/Classes/RTCMediaSource+Private.h
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCVideoSource+Private.h b/webrtc/sdk/objc/Framework/Classes/RTCMediaSource+Private.h
similarity index 60%
copy from webrtc/sdk/objc/Framework/Classes/RTCVideoSource+Private.h
copy to webrtc/sdk/objc/Framework/Classes/RTCMediaSource+Private.h
index 757c1746ef76e2667aed38e19d0420e38571803c..55d268a495fe82823bcf35a4c2f397d3d1c9d1fa 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCVideoSource+Private.h
+++ b/webrtc/sdk/objc/Framework/Classes/RTCMediaSource+Private.h
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
+ *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
@@ -8,25 +8,25 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import "WebRTC/RTCVideoSource.h"
+#import "WebRTC/RTCMediaSource.h"
 
 #include "webrtc/api/mediastreaminterface.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface RTCVideoSource ()
+typedef NS_ENUM(NSInteger, RTCMediaSourceType) {
+  RTCMediaSourceTypeAudio,
+  RTCMediaSourceTypeVideo,
+};
+
+@interface RTCMediaSource ()
 
-/**
- * The VideoTrackSourceInterface object passed to this RTCVideoSource during
- * construction.
- */
 @property(nonatomic, readonly)
-    rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>
-        nativeVideoSource;
+    rtc::scoped_refptr<webrtc::MediaSourceInterface> nativeMediaSource;
 
-/** Initialize an RTCVideoSource from a native VideoTrackSourceInterface. */
-- (instancetype)initWithNativeVideoSource:
-    (rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)nativeVideoSource
+- (instancetype)initWithNativeMediaSource:
+   (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource
+                                     type:(RTCMediaSourceType)type
     NS_DESIGNATED_INITIALIZER;
 
 + (webrtc::MediaSourceInterface::SourceState)nativeSourceStateForState: