Remove enable_media_router.

chrome/common/pref_names.h

Index: chrome/common/pref_names.h
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 8b7f3ed4dd4add25094733a0f598a137de72ab06..8575463e7d04520a14cab1c93208bd7aebefd348 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -748,12 +748,10 @@ extern const char kResolveDeviceTimezoneByGeolocation[];
 extern const char kSystemTimezoneAutomaticDetectionPolicy[];
 #endif  // defined(OS_CHROMEOS)
 
-#if defined(ENABLE_MEDIA_ROUTER)
 extern const char kEnableMediaRouter[];
 #if !defined(OS_ANDROID)
 extern const char kShowCastIconInToolbar[];
 #endif  // !defined(OS_ANDROID)
-#endif  // defined(ENABLE_MEDIA_ROUTER)
 
 #if !defined(OS_ANDROID)
 extern const char kAttemptedToEnableAutoupdate[];
@@ -863,12 +861,10 @@ extern const char kClickedUpdateMenuItem[];
 extern const char kLatestVersionWhenClickedUpdateMenuItem[];
 #endif
 
-#if defined(ENABLE_MEDIA_ROUTER)
 extern const char kMediaRouterCloudServicesPrefSet[];
 extern const char kMediaRouterEnableCloudServices[];
 extern const char kMediaRouterFirstRunFlowAcknowledged[];
 extern const char kMediaRouterTabMirroringSources[];
-#endif
 
 extern const char kOriginTrialPublicKey[];
 extern const char kOriginTrialDisabledFeatures[];