Implement a means of letting native VR Shell control the HTML UI.

chrome/browser/android/vr_shell/vr_shell.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_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 10 matching lines @@
 namespace content {
 class WebContents;
 }
 
 namespace ui {
 class WindowAndroid;
 }
 
 namespace vr_shell {
 
+class UiInterface;
 class UiScene;
 class VrCompositor;
 class VrController;
 class VrInputManager;
 class VrShellDelegate;
 class VrShellRenderer;
 struct ContentRectangle;
 struct VrGesture;
 
 enum UiAction {
@@ skipping 31 matching lines @@
   void OnPause(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void OnResume(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void SetWebVrMode(JNIEnv* env,
                     const base::android::JavaParamRef<jobject>& obj,
                     bool enabled);
 
   // html/js UI hooks.
   static base::WeakPtr<VrShell> GetWeakPtr(
       const content::WebContents* web_contents);
   UiScene* GetScene();
+  UiInterface* GetUiInterface();
   void OnDomContentsLoaded();
 
   // device::GvrDelegate implementation
   void SetWebVRSecureOrigin(bool secure_origin) override;
   void SubmitWebVRFrame() override;
   void UpdateWebVRTextureBounds(
       int eye, float left, float top, float width, float height) override;
   gvr::GvrApi* gvr_api() override;
   void SetGvrPoseForWebVr(const gvr::Mat4f& pose, uint32_t pose_num) override;
 
@@ skipping 42 matching lines @@
 
   // samplerExternalOES texture data for UI content image.
   jint ui_texture_id_ = 0;
   // samplerExternalOES texture data for main content image.
   jint content_texture_id_ = 0;
 
   float desktop_screen_tilt_;
   float desktop_height_;
 
   std::unique_ptr<UiScene> scene_;
+  std::unique_ptr<UiInterface> html_interface_;
 
   std::unique_ptr<gvr::GvrApi> gvr_api_;
   std::unique_ptr<gvr::BufferViewportList> buffer_viewport_list_;
   std::unique_ptr<gvr::BufferViewport> buffer_viewport_;
   std::unique_ptr<gvr::SwapChain> swap_chain_;
 
   gvr::Sizei render_size_;
 
   std::queue<base::Callback<void()>> task_queue_;
   base::Lock task_queue_lock_;
@@ skipping 32 matching lines @@
   base::WeakPtrFactory<VrShell> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShell);
 };
 
 bool RegisterVrShell(JNIEnv* env);
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_