Remove enable-speech-dispatcher flag

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index c9d89d655179c3bdb232f6e7866961f08288041e..7283ea04fc4dd9a7903e5cef6aff6de5fd69e3e5 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -915,13 +915,6 @@ const char kDisableVaapiAcceleratedVideoEncode[] =
     "disable-vaapi-accelerated-video-encode";
 #endif
 
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
-// Allows sending text-to-speech requests to speech-dispatcher, a common
-// Linux speech service. Because it's buggy, the user must explicitly
-// enable it so that visiting a random webpage can't cause instability.
-const char kEnableSpeechDispatcher[] = "enable-speech-dispatcher";
-#endif
-
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 // Disables support for Core Animation plugins. This is triggered when
 // accelerated compositing is disabled. See http://crbug.com/122430 .