Add way to get native VR UI information from Java

chrome/browser/android/vr_shell/vr_shell_gl.h

Index: chrome/browser/android/vr_shell/vr_shell_gl.h
diff --git a/chrome/browser/android/vr_shell/vr_shell_gl.h b/chrome/browser/android/vr_shell/vr_shell_gl.h
index 7a035eb8b69efa6ff351e3f7ca1e5e02ce9183ea..4939c91699fb1ec1a3acc068e923d7a6f069ed43 100644
--- a/chrome/browser/android/vr_shell/vr_shell_gl.h
+++ b/chrome/browser/android/vr_shell/vr_shell_gl.h
@@ -7,6 +7,7 @@
 
 #include <memory>
 #include <queue>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -15,6 +16,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
+#include "base/values.h"
 #include "device/vr/android/gvr/gvr_delegate.h"
 #include "device/vr/vr_service.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
@@ -108,6 +110,11 @@ class VrShellGl : public device::mojom::VRVSyncProvider {
   void SubmitWebVRFrame(int16_t frame_index, const gpu::MailboxHolder& mailbox);
   void SetSubmitClient(
       device::mojom::VRSubmitFrameClientPtrInfo submit_client_info);
+  void CreateUiElementInfos(
+      const std::vector<std::string>& element_names,
+      int callback_id,
+      const base::Callback<void(int, std::unique_ptr<base::DictionaryValue>)>
+          on_created);
 
  private:
   void GvrInit(gvr_context* gvr_api);