Move Objective-C video renderers to webrtc/api/objc.

webrtc/api/BUILD.gn

Index: webrtc/api/BUILD.gn
diff --git a/webrtc/api/BUILD.gn b/webrtc/api/BUILD.gn
index 019c26b93fb27f9bd8f664aaa53eda5c0ed06508..950a5cd4221c95704c816f0a94d40a9e13e0cefe 100644
--- a/webrtc/api/BUILD.gn
+++ b/webrtc/api/BUILD.gn
@@ -24,7 +24,24 @@ if (is_ios) {
       "objc/RTCIceServer+Private.h",
       "objc/RTCIceServer.h",
       "objc/RTCIceServer.mm",
+      "objc/RTCOpenGLVideoRenderer.h",
+      "objc/RTCOpenGLVideoRenderer.mm",
+      "objc/RTCVideoRenderer.h",
       "objc/WebRTC-Prefix.pch",
     ]
+
+    if (is_ios) {
+      sources += [
+        "objc/RTCEAGLVideoView.h",
+        "objc/RTCEAGLVideoView.mm",
+      ]
+    }
+
+    if (is_mac) {
+      sources += [
+        "objc/RTCNSGLVideoView.h",
+        "objc/RTCNSGLVideoView.mm",
+      ]
+    }
   }
 }