Fine tuned availability of hotword plugin.

chrome/browser/search/hotword_service.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_
 
 #include "base/basictypes.h"
 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 
 class Profile;
 
 namespace hotword_internal {
 // Constants for the hotword field trial.
 extern const char kHotwordFieldTrialName[];
 extern const char kHotwordFieldTrialDisabledGroupName[];
 }  // namespace hotword_internal
 
 // Provides an interface for the Hotword component that does voice triggered
 // search.
 class HotwordService : public BrowserContextKeyedService {
  public:
+  // Returns true if the current system language supports hotword.
+  static bool DoesLanguageSupportHotword(Profile* profile);

[rpetterson, 2014/02/09 18:27:19]

Please rename to DoesHotwordSupportLanguage

[Jun Mukai, 2014/02/10 20:50:37]

Done.

+
   explicit HotwordService(Profile* profile);
   virtual ~HotwordService();
 
   bool ShouldShowOptInPopup();
 
   // Used in testing to ensure that the popup is not shown more than this
   // maximum number of times.
   int MaxNumberTimesToShowOptInPopup();
 
   // In addition to showing the popup, the preferences
   // kHotwordOptInPopupTimesShown is also incremented.
   void ShowOptInPopup();
 
   // Checks for whether all the necessary files have downloaded to allow for
   // using the extension.
   virtual bool IsServiceAvailable();
 
   // Determine if hotwording is allowed in this profile based on field trials
   // and language.
   virtual bool IsHotwordAllowed();
 
  private:
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(HotwordService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_