Remove enable_media_router.

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 0e6340d54882e17307f2bf2a0251ccfcbf8fdbcb..b646ef9dfcc942589baad489384fa1be5f1c77b2 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -396,12 +396,10 @@ void ProfileImpl::RegisterProfilePrefs(
   registry->RegisterStringPref(
       prefs::kPrintPreviewDefaultDestinationSelectionRules, std::string());
   registry->RegisterBooleanPref(prefs::kForceEphemeralProfiles, false);
-#if defined(ENABLE_MEDIA_ROUTER)
   registry->RegisterBooleanPref(prefs::kEnableMediaRouter, true);
 #if !defined(OS_ANDROID)
   registry->RegisterBooleanPref(prefs::kShowCastIconInToolbar, false);
 #endif  // !defined(OS_ANDROID)
-#endif  // defined(ENABLE_MEDIA_ROUTER)
   // Initialize the cache prefs.
   registry->RegisterFilePathPref(prefs::kDiskCacheDir, base::FilePath());
   registry->RegisterIntegerPref(prefs::kDiskCacheSize, 0);