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

chrome/browser/ui/webui/options/sync_setup_handler.h

Index: chrome/browser/ui/webui/options/sync_setup_handler.h
diff --git a/chrome/browser/ui/webui/options/sync_setup_handler.h b/chrome/browser/ui/webui/options/sync_setup_handler.h
index b1bb5b645c5cfb17f03fb1b1d8d23063252985bd..4ed025a7c9a5057d6929675687e30bdd7bc61acd 100644
--- a/chrome/browser/ui/webui/options/sync_setup_handler.h
+++ b/chrome/browser/ui/webui/options/sync_setup_handler.h
@@ -13,7 +13,6 @@
 #include "chrome/browser/ui/webui/signin/login_ui_service.h"
 
 class LoginUIService;
-class ProfileManager;
 class ProfileSyncService;
 class SigninManagerBase;
 
@@ -25,8 +24,7 @@ class SyncSetupHandler : public options::OptionsPageUIHandler,
                          public SyncStartupTracker::Observer,
                          public LoginUIService::LoginUI {
  public:
-  // Constructs a new SyncSetupHandler. |profile_manager| may be NULL.
-  explicit SyncSetupHandler(ProfileManager* profile_manager);
+  SyncSetupHandler();
   ~SyncSetupHandler() override;
 
   // OptionsPageUIHandler implementation.
@@ -152,9 +150,6 @@ class SyncSetupHandler : public options::OptionsPageUIHandler,
   // histograms in the case that the user cancels out.
   bool configuring_sync_;
 
-  // Weak reference to the profile manager.
-  ProfileManager* const profile_manager_;
-
   // The OneShotTimer object used to timeout of starting the sync backend
   // service.
   scoped_ptr<base::OneShotTimer<SyncSetupHandler> > backend_start_timer_;