Notify hotwording extension of microphone state change.

chrome/browser/ui/webui/voice_search_ui.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/voice_search_ui.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
@@ skipping 252 matching lines @@
       if (content::PluginService::GetInstance()->GetPluginInfoByPath(path,
                                                                      &info) &&
           plugin_prefs->IsPluginEnabled(info)) {
         nacl_enabled = "Yes";
       }
     }
 #endif
 
     AddPair(list, "NaCl Enabled", nacl_enabled);
 
-    AddPair(list,
-            "Microphone",
-            HotwordServiceFactory::IsMicrophoneAvailable() ? "Yes" : "No");
+    HotwordService* hotword_service =
+        HotwordServiceFactory::GetForProfile(profile_);
+    AddPair(list, "Microphone",
+            hotword_service && hotword_service->microphone_available() ? "Yes"
+                                                                       : "No");
 
     std::string audio_capture = "No";
     if (profile_->GetPrefs()->GetBoolean(prefs::kAudioCaptureAllowed))
       audio_capture = "Yes";
     AddPair(list, "Audio Capture Allowed", audio_capture);
 
     AddLineBreak(list);
   }
 
   // Adds information regarding languages to the list.
@@ skipping 150 matching lines @@
 VoiceSearchUI::VoiceSearchUI(content::WebUI* web_ui)
     : content::WebUIController(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
   web_ui->AddMessageHandler(new VoiceSearchDomHandler(profile));
 
   // Set up the about:voicesearch source.
   content::WebUIDataSource::Add(profile, CreateVoiceSearchUiHtmlSource());
 }
 
 VoiceSearchUI::~VoiceSearchUI() {}