If speech input is disabled and we receive IPC calls, terminate the renderer.

chrome/browser/speech/speech_input_manager.h

Index: chrome/browser/speech/speech_input_manager.h
diff --git a/chrome/browser/speech/speech_input_manager.h b/chrome/browser/speech/speech_input_manager.h
index be9779ff73211dd4fb62ff7b9aeb3de076721cf8..ffeaba0d700f3251857b899f24da8f7fc933bba0 100644
--- a/chrome/browser/speech/speech_input_manager.h
+++ b/chrome/browser/speech/speech_input_manager.h
@@ -32,6 +32,10 @@ class SpeechInputManager {
     virtual ~Delegate() {}
   };
 
+  // Whether the speech input feature is enabled, based on the browser channel
+  // information and command line flags.
+  static bool IsFeatureEnabled();
+
   // Factory method to access the singleton. We have this method here instead of
   // using Singleton<> directly in the calling code to aid tests in injection
   // mocks.