Enable speech input by default and remove unused code.

chrome/browser/speech/speech_input_manager.cc

Index: chrome/browser/speech/speech_input_manager.cc
diff --git a/chrome/browser/speech/speech_input_manager.cc b/chrome/browser/speech/speech_input_manager.cc
index cbc6f12fad9acb76c1bb81063ff0fdd3dbb11460..5f65e0275c5e5abf916bdc2a9031e258790d977a 100644
--- a/chrome/browser/speech/speech_input_manager.cc
+++ b/chrome/browser/speech/speech_input_manager.cc
@@ -7,7 +7,6 @@
 #include <map>
 #include <string>
 
-#include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/ref_counted.h"
 #include "base/synchronization/lock.h"
@@ -163,26 +162,6 @@ SpeechInputManager* SpeechInputManager::Get() {
   return g_speech_input_manager_impl.Pointer();
 }
 
-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;
-}
-
 void SpeechInputManager::ShowAudioInputSettings() {
   // Since AudioManager::ShowAudioInputSettings can potentially launch external
   // processes, do that in the FILE thread to not block the calling threads.