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

chrome/browser/speech/speech_input_manager.cc

Index: chrome/browser/speech/speech_input_manager.cc
===================================================================
--- chrome/browser/speech/speech_input_manager.cc	(revision 70616)
+++ chrome/browser/speech/speech_input_manager.cc	(working copy)
@@ -5,14 +5,16 @@
 #include "chrome/browser/speech/speech_input_manager.h"
 
 #include "app/l10n_util.h"
-#include "base/ref_counted.h"
-#include "base/singleton.h"
-#include "chrome/browser/chrome_thread.h"
+#include "base/command_line.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/browser_thread.h"
+#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/speech/speech_input_bubble_controller.h"
 #include "chrome/browser/speech/speech_recognizer.h"
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_util.h"
+#include "chrome/common/chrome_switches.h"
 #include "grit/generated_resources.h"
 #include "media/audio/audio_manager.h"
 #include <map>
@@ -78,6 +80,26 @@
   return Singleton<SpeechInputManagerImpl>::get();
 }
 
+bool SpeechInputManager::IsFeatureEnabled() {
+  bool enabled = true;
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+
+  if (command_line.HasSwitch(switches::kDisableSpeechInput)) {
+    enabled = false;
+#if defined(GOOGLE_CHROME_BUILD)
+  } else if (!command_line.HasSwitch(switches::kEnableSpeechInput)) {
+    // We need to evaluate whether IO is OK here. http://crbug.com/63335.
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
+    // Official Chrome builds have speech input enabled by default only in the
+    // dev channel.
+    std::string channel = platform_util::GetVersionStringModifier();
+    enabled = (channel == "dev");
+#endif
+  }
+
+  return enabled;
+}
+
 SpeechInputManagerImpl::SpeechInputManagerImpl()
     : recording_caller_id_(0),
       bubble_controller_(new SpeechInputBubbleController(