Add way to get native VR UI information from Java

chrome/browser/android/vr_shell/vr_shell_gl.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_
 
 #include <memory>
 #include <queue>
+#include <string>
 #include <utility>
 #include <vector>
 
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #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"
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr.h"
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr_types.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace base {
 class ListValue;
 }
@@ skipping 73 matching lines @@
   void UpdateVSyncInterval(int64_t timebase_nanos, double interval_seconds);
 
   void OnRequest(device::mojom::VRVSyncProviderRequest request);
   void ResetPose();
   void CreateVRDisplayInfo(
       const base::Callback<void(device::mojom::VRDisplayInfoPtr)>& callback,
       uint32_t device_id);
   void SubmitWebVRFrame(int16_t frame_index, const gpu::MailboxHolder& mailbox);
   void SetSubmitClient(
       device::mojom::VRSubmitFrameClientPtrInfo submit_client_info);
+  void CreateUiElementInfos(
+      std::vector<std::string> element_names,

[cjgrant, 2017/03/29 21:16:06]

const std::vector<std::string>&...  Again, avoid the copy.

[bsheedy, 2017/03/29 22:33:45]

Done.

+      int callback_id,
+      const base::Callback<void(int, std::unique_ptr<base::DictionaryValue>)>
+          on_created);
 
  private:
   void GvrInit(gvr_context* gvr_api);
   void InitializeRenderer();
   void DrawFrame(int16_t frame_index);
   void DrawWorldElements(const gvr::Mat4f& head_pose);
   void DrawHeadLockedElements();
   void DrawUiView(const gvr::Mat4f& head_pose,
                   const std::vector<const ContentRectangle*>& elements,
                   const gvr::Sizei& render_size,
@@ skipping 117 matching lines @@
   gvr::Vec3f controller_start_direction_;
 
   base::WeakPtrFactory<VrShellGl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShellGl);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_GL_H_