VR: Factor transient timing out of UiSceneManager.

chrome/browser/android/vr_shell/ui_elements/transient_url_bar.h

Index: chrome/browser/android/vr_shell/ui_elements/transient_url_bar.h
diff --git a/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.h b/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.h
index da311bfb81a5e0225173af3a23bd50c91277e36d..b28d166221e17e4a4cee41fbdc77e745aabb1450 100644
--- a/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.h
+++ b/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.h
@@ -11,6 +11,7 @@
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "chrome/browser/android/vr_shell/ui_elements/textured_element.h"
+#include "chrome/browser/android/vr_shell/ui_elements/transience_manager.h"
 #include "chrome/browser/android/vr_shell/ui_unsupported_mode.h"
 #include "components/security_state/core/security_state.h"
 #include "url/gurl.h"
@@ -26,15 +27,19 @@ class TransientUrlBar : public TexturedElement {
  public:
   TransientUrlBar(
       int preferred_width,
+      const base::TimeDelta& timeout,
       const base::Callback<void(UiUnsupportedMode)>& failure_callback);
   ~TransientUrlBar() override;
 
+  void SetEnabled(bool enabled) override;
+
   void SetToolbarState(const ToolbarState& state);
 
  private:
   UiTexture* GetTexture() const override;
 
   std::unique_ptr<UrlBarTexture> texture_;
+  TransienceManager transience_;
 
   DISALLOW_COPY_AND_ASSIGN(TransientUrlBar);
 };