Cleanup: Remove unused variables in chrome/ found by Scythe.

chrome/browser/ui/app_list/speech_auth_helper.h

Index: chrome/browser/ui/app_list/speech_auth_helper.h
diff --git a/chrome/browser/ui/app_list/speech_auth_helper.h b/chrome/browser/ui/app_list/speech_auth_helper.h
index 01122f67d447cb3c5ab5a0d15f8052f43ea3233b..d5b9094a125faa6a0e4f6ab98bf096db541e56f3 100644
--- a/chrome/browser/ui/app_list/speech_auth_helper.h
+++ b/chrome/browser/ui/app_list/speech_auth_helper.h
@@ -26,15 +26,15 @@ namespace app_list {
 class SpeechAuthHelper : public OAuth2TokenService::Consumer,
                          public OAuth2TokenService::Observer {
  public:
-  explicit SpeechAuthHelper(Profile* profile, base::Clock* clock);
+  SpeechAuthHelper(Profile* profile, base::Clock* clock);
   ~SpeechAuthHelper() override;
 
   // Returns the current auth token. If the auth service is not available, or
   // there was a failure in obtaining a token, return the empty string.
-  std::string GetToken();
+  std::string GetToken() const;
 
   // Returns the OAuth scope associated with the auth token.
-  std::string GetScope();
+  std::string GetScope() const;
 
  private:
   // Overridden from OAuth2TokenService::Consumer:
@@ -50,7 +50,6 @@ class SpeechAuthHelper : public OAuth2TokenService::Consumer,
   void ScheduleTokenFetch(const base::TimeDelta& fetch_delay);
   void FetchAuthToken();
 
-  Profile* profile_;
   base::Clock* clock_;
   ProfileOAuth2TokenService* token_service_;
   std::string authenticated_account_id_;