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..8d6e28f7e7461b2400dcd3bc5012d9d5effbf642 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"
@@ -15,6 +16,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
+#include "base/time/default_clock.h"
 #include "chrome/browser/ui/app_list/speech_recognizer_delegate.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/web_contents.h"
@@ -29,6 +31,7 @@ class Profile;
 namespace app_list {
 
 class RecommendedApps;
+class SpeechAuthHelper;
 class SpeechRecognizer;
 class StartPageObserver;
 
@@ -70,6 +73,8 @@ 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.
@@ -113,7 +118,9 @@ class StartPageService : public KeyedService,
   bool webui_finished_loading_;
   std::vector<base::Closure> pending_webui_callbacks_;
 
+  base::DefaultClock clock_;
   scoped_ptr<SpeechRecognizer> speech_recognizer_;
+  scoped_ptr<SpeechAuthHelper> speech_auth_helper_;
 
 #if defined(OS_CHROMEOS)
   scoped_ptr<AudioStatus> audio_status_;