[Media Router] Add experiment control logic.

chrome/browser/ui/browser_commands.cc

Index: chrome/browser/ui/browser_commands.cc
diff --git a/chrome/browser/ui/browser_commands.cc b/chrome/browser/ui/browser_commands.cc
index 06432ba9a04ea5a315cf378988bd594a637bc683..49715ee586dca5d755e5b81d6ee8bf70244b8b4d 100644
--- a/chrome/browser/ui/browser_commands.cc
+++ b/chrome/browser/ui/browser_commands.cc
@@ -17,7 +17,7 @@
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/dom_distiller/tab_utils.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
-#include "chrome/browser/media/router/media_router_dialog_controller.h"
+#include "chrome/browser/media/router/media_router_feature.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
@@ -111,6 +111,10 @@
 #include "components/rlz/rlz_tracker.h"
 #endif
 
+#if defined(ENABLE_MEDIA_ROUTER)
+#include "chrome/browser/media/router/media_router_dialog_controller.h"
+#endif
+
 namespace {
 const char kOsOverrideForTabletSite[] = "Linux; Android 4.0.3";
 }
@@ -917,7 +921,8 @@ bool CanBasicPrint(Browser* browser) {
 #endif  // ENABLE_BASIC_PRINTING
 
 bool CanRouteMedia(Browser* browser) {
-  if (!switches::MediaRouterEnabled() || browser->profile()->IsOffTheRecord())
+  if (!media_router::MediaRouterEnabled() ||
+      browser->profile()->IsOffTheRecord())
     return false;
 
   // Do not allow user to open Media Router dialog when there is already an
@@ -926,6 +931,7 @@ bool CanRouteMedia(Browser* browser) {
 }
 
 void RouteMedia(Browser* browser) {
+#if defined(ENABLE_MEDIA_ROUTER)
   DCHECK(CanRouteMedia(browser));
 
   media_router::MediaRouterDialogController* dialog_controller =
@@ -935,6 +941,7 @@ void RouteMedia(Browser* browser) {
     return;
 
   dialog_controller->ShowMediaRouterDialog();
+#endif  // defined(ENABLE_MEDIA_ROUTER)
 }
 
 void EmailPageLocation(Browser* browser) {