mash: Change CastConfigDelegate to a mojoified CastConfigClient.

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
index a1e27b94fa3694c0dd7b5744ba60a66fcc086270..239fa82066e863f99ef9e552fc10d8a448b89abb 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 
+class CastConfigClientMediaRouter;
 class ChromeLauncherControllerMus;
 class ImmersiveContextMus;
 class ImmersiveHandlerFactoryMus;
@@ -28,6 +29,7 @@ class ChromeBrowserMainExtraPartsAsh : public ChromeBrowserMainExtraParts {
 
  private:
   std::unique_ptr<ChromeLauncherControllerMus> chrome_launcher_controller_mus_;
+  std::unique_ptr<CastConfigClientMediaRouter> cast_config_client_media_router_;
   std::unique_ptr<ImmersiveHandlerFactoryMus> immersive_handler_factory_;
   std::unique_ptr<ImmersiveContextMus> immersive_context_;
   std::unique_ptr<SystemTrayClient> system_tray_client_;