[Media Router] Add experiment control logic.

chrome/browser/extensions/chrome_mojo_service_registration.cc

Index: chrome/browser/extensions/chrome_mojo_service_registration.cc
diff --git a/chrome/browser/extensions/chrome_mojo_service_registration.cc b/chrome/browser/extensions/chrome_mojo_service_registration.cc
index dc6651b0242b06ed490aa02ab8e82d62e59562c9..8bf9799a7d69c4d859c7a81b2142d90f0ce4602a 100644
--- a/chrome/browser/extensions/chrome_mojo_service_registration.cc
+++ b/chrome/browser/extensions/chrome_mojo_service_registration.cc
@@ -5,18 +5,16 @@
 #include "chrome/browser/extensions/chrome_mojo_service_registration.h"
 
 #include "base/bind.h"
-#include "base/command_line.h"
 #include "base/logging.h"
-#include "chrome/common/chrome_switches.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/service_registry.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/permissions/api_permission.h"
 #include "extensions/common/permissions/permissions_data.h"
-#include "extensions/common/switches.h"
 
 #if defined(ENABLE_MEDIA_ROUTER)
+#include "chrome/browser/media/router/media_router_feature.h"
 #include "chrome/browser/media/router/media_router_mojo_impl.h"
 #endif
 
@@ -28,8 +26,7 @@ void RegisterChromeServicesForFrame(content::RenderFrameHost* render_frame_host,
   DCHECK(extension);
 
 #if defined(ENABLE_MEDIA_ROUTER)
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          ::switches::kEnableMediaRouter)) {
+  if (media_router::MediaRouterEnabled()) {
     if (extension->permissions_data()->HasAPIPermission(
             APIPermission::kMediaRouterPrivate)) {
       render_frame_host->GetServiceRegistry()->AddService(base::Bind(