[Media Router] Add experiment control logic.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 89093a0a156540c8340530ac24eb540182b85811..bc086cfc0e2499f98bd4f0da388bfa7a73d92f24 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1359,21 +1359,6 @@ bool MdPolicyPageEnabled() {
       ::switches::kEnableMaterialDesignPolicyPage);
 }
 
-bool MediaRouterEnabled() {
-#if defined(ENABLE_MEDIA_ROUTER)
-
-#if defined(OS_ANDROID)
-  return true;
-#else
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-      ::switches::kEnableMediaRouter);
-#endif  // defined(OS_ANDROID).
-
-#else
-  return false;
-#endif  // defined(ENABLE_MEDIA_ROUTER)
-}
-
 bool PdfMaterialUIEnabled() {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(kEnablePdfMaterialUI))
     return true;