Eliminate the launcher speech recognizer's dependency on the start page WebContents.

chrome/browser/ui/app_list/start_page_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_UI_APP_LIST_START_PAGE_SERVICE_H_
 #define CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 54 matching lines @@
 
   RecommendedApps* recommended_apps() { return recommended_apps_.get(); }
   Profile* profile() { return profile_; }
   SpeechRecognitionState state() { return state_; }
 
   // Overridden from app_list::SpeechRecognizerDelegate:
   void OnSpeechResult(const base::string16& query, bool is_final) override;
   void OnSpeechSoundLevelChanged(int16_t level) override;
   void OnSpeechRecognitionStateChanged(
       SpeechRecognitionState new_state) override;
-  content::WebContents* GetSpeechContents() override;
   void GetSpeechAuthParameters(std::string* auth_scope,
                                std::string* auth_token) override;
 
  protected:
   // Protected for testing.
   explicit StartPageService(Profile* profile);
   ~StartPageService() override;
 
  private:
   friend class StartPageServiceFactory;
@@ skipping 41 matching lines @@
 #endif
 
   base::WeakPtrFactory<StartPageService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(StartPageService);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_