Add OAuth2 authentication for some voice transcription requests.

chrome/browser/ui/app_list/start_page_service.h

Index: chrome/browser/ui/app_list/start_page_service.h
diff --git a/chrome/browser/ui/app_list/start_page_service.h b/chrome/browser/ui/app_list/start_page_service.h
index d33bd531bbd29826fc90f2c6560ed88b22da43ed..e1f90e8552fbac52f21fb64721373a00a24c3295 100644
--- a/chrome/browser/ui/app_list/start_page_service.h
+++ b/chrome/browser/ui/app_list/start_page_service.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
 
 #include <stdint.h>
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ -29,6 +30,7 @@ class Profile;
 namespace app_list {
 
 class RecommendedApps;
+class SpeechAuthHelper;
 class SpeechRecognizer;
 class StartPageObserver;
 
@@ -70,6 +72,8 @@ class StartPageService : public KeyedService,
   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.
@@ -114,6 +118,7 @@ class StartPageService : public KeyedService,
   std::vector<base::Closure> pending_webui_callbacks_;
 
   scoped_ptr<SpeechRecognizer> speech_recognizer_;
+  scoped_ptr<SpeechAuthHelper> speech_auth_helper_;
 
 #if defined(OS_CHROMEOS)
   scoped_ptr<AudioStatus> audio_status_;