VR: Fix HTTP warning staying visible after exiting WebVR.

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

Index: chrome/browser/android/vr_shell/ui_elements/ui_element.h
diff --git a/chrome/browser/android/vr_shell/ui_elements/ui_element.h b/chrome/browser/android/vr_shell/ui_elements/ui_element.h
index 2d7aee23377b1f035dbd0dfe55cde61e221b2c05..85246fd2d92c57d12777eedf921c1e4a7cc6ab57 100644
--- a/chrome/browser/android/vr_shell/ui_elements/ui_element.h
+++ b/chrome/browser/android/vr_shell/ui_elements/ui_element.h
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/macros.h"
+#include "chrome/browser/android/vr_shell/ui_elements/ui_element_identifiers.h"
 #include "device/vr/vr_types.h"
 
 namespace base {
@@ -231,6 +232,12 @@ class UiElement : public WorldRectangle {
   bool dirty() const { return dirty_; }
   void set_dirty(bool dirty) { dirty_ = dirty; }
 
+  // A flag usable during transformation calculates to avoid duplicate work.
+  UiElementIdentifier identifier() const { return identifier_; }
+  void set_identifier(UiElementIdentifier identifier) {
+    identifier_ = identifier;
+  }
+
   // By default, sets an element to be visible or not. This may be overridden to
   // allow finer control of element visibility.
   virtual void SetEnabled(bool enabled);
@@ -244,7 +251,7 @@ class UiElement : public WorldRectangle {
   int parent_id_ = -1;
 
   // If true, this object will be visible.
-  bool visible_ = true;
+  bool visible_ = false;
 
   // If false, the reticle will not hit the element, even if visible.
   bool hit_testable_ = true;
@@ -299,6 +306,9 @@ class UiElement : public WorldRectangle {
   // A flag usable during transformation calculates to avoid duplicate work.
   bool dirty_ = false;
 
+  // An identifier used for testing and debugging, in lieu of a string.
+  UiElementIdentifier identifier_ = UiElementIdentifier::kNone;
+
   Transform transform_;
 
   DISALLOW_COPY_AND_ASSIGN(UiElement);