VR: Factor transient timing out of UiSceneManager.

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

Index: chrome/browser/android/vr_shell/ui_elements/transient_url_bar.cc
diff --git a/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.cc b/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.cc
index b6a88190297b1b4646147beedc43616867f3d55b..ad4c4e5c123432437b74771eb570d3a84e389e5a 100644
--- a/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.cc
+++ b/chrome/browser/android/vr_shell/ui_elements/transient_url_bar.cc
@@ -11,9 +11,11 @@ namespace vr_shell {
 
 TransientUrlBar::TransientUrlBar(
     int preferred_width,
+    const base::TimeDelta& timeout,
     const base::Callback<void(UiUnsupportedMode)>& failure_callback)
     : TexturedElement(preferred_width),
-      texture_(base::MakeUnique<UrlBarTexture>(true, failure_callback)) {}
+      texture_(base::MakeUnique<UrlBarTexture>(true, failure_callback)),
+      transience_(this, timeout) {}
 
 TransientUrlBar::~TransientUrlBar() = default;
 
@@ -21,6 +23,10 @@ UiTexture* TransientUrlBar::GetTexture() const {
   return texture_.get();
 }
 
+void TransientUrlBar::SetEnabled(bool enabled) {
+  transience_.SetEnabled(enabled);
+}
+
 void TransientUrlBar::SetToolbarState(const ToolbarState& state) {
   texture_->SetToolbarState(state);
 }