Draw WebVR security overlay with a non-reprojected viewport

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 127 matching lines @@
   jint content_texture_id_ = 0;
 
   float desktop_screen_tilt_;
   float desktop_height_;
 
   std::unique_ptr<UiScene> scene_;
 
   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::BufferViewport> overlay_left_viewport_;
+  std::unique_ptr<gvr::BufferViewport> overlay_right_viewport_;
   std::unique_ptr<gvr::SwapChain> swap_chain_;
 
   gvr::Sizei render_size_;
 
   std::queue<base::Callback<void()>> task_queue_;
   base::Lock task_queue_lock_;
 
   std::unique_ptr<VrCompositor> content_compositor_;
   content::WebContents* main_contents_;
   std::unique_ptr<VrCompositor> ui_compositor_;
   content::WebContents* ui_contents_;
 
   VrShellDelegate* delegate_ = nullptr;
   std::unique_ptr<VrShellRenderer> vr_shell_renderer_;
   base::android::ScopedJavaGlobalRef<jobject> j_vr_shell_;
 
   bool touch_pending_ = false;
   gvr::Quatf controller_quat_;
 
   gvr::Vec3f target_point_;
   const ContentRectangle* target_element_ = nullptr;
   VrInputManager* current_input_target_ = nullptr;
   int ui_tex_width_ = 0;
   int ui_tex_height_ = 0;
+  bool dom_contents_loaded_ = false;

[cjgrant, 2016/10/21 18:29:03]

This will probably disappear with my change.  Native rendering shouldn't care if
the DOM contents have loaded, because the HTML UI will drive the security
warnings.

 
   bool webvr_mode_ = false;
   bool webvr_secure_origin_ = false;
   int64_t webvr_warning_end_nanos_ = 0;
   // The pose ring buffer size must be a power of two to avoid glitches when
   // the pose index wraps around. It should be large enough to handle the
   // current backlog of poses which is 2-3 frames.
   static constexpr int kPoseRingBufferSize = 8;
   std::vector<gvr::Mat4f> webvr_head_pose_;
 
   std::unique_ptr<VrController> controller_;
   scoped_refptr<VrInputManager> content_input_manager_;
   scoped_refptr<VrInputManager> ui_input_manager_;
 
   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_