Introduce struct MediaConfig, with construction-time settings.

webrtc/api/fakemediacontroller.h

Index: webrtc/api/fakemediacontroller.h
diff --git a/webrtc/api/fakemediacontroller.h b/webrtc/api/fakemediacontroller.h
index 56af5cfe38e71af8b514c8dd9084afec956a19cb..0ff8a5562265554eeecffe4f65f0579c7dd4530e 100644
--- a/webrtc/api/fakemediacontroller.h
+++ b/webrtc/api/fakemediacontroller.h
@@ -13,6 +13,7 @@
 
 #include "webrtc/api/mediacontroller.h"
 #include "webrtc/base/checks.h"
+#include "webrtc/media/base/mediachannel.h"
 
 namespace cricket {
 
@@ -29,8 +30,12 @@ class FakeMediaController : public webrtc::MediaControllerInterface {
   cricket::ChannelManager* channel_manager() const override {
     return channel_manager_;
   }
+  const MediaConfig& config() const override {
+    return media_config_;
+  }
 
  private:
+  const MediaConfig media_config_ = MediaConfig();

[pbos-webrtc, 2016/02/11 11:34:10]

Don't need the initialization here, media_config_ should default initialize.

[nisse-webrtc, 2016/02/11 12:10:18]

Unfortunately, the compiler doesn't agree. If I remove the initializer I get 

error: constructor for 'cricket::FakeMediaController' must explicitly initialize
the const member 'media_config_'

I'm afraid I don't understand the fine details about default initialization in
C++. I could move the initializer to the constructor :-list, but I don't think
that makes the code clearer.

   cricket::ChannelManager* channel_manager_;
   webrtc::Call* call_;
 };