VrShell: implement insecure content warning display

chrome/browser/android/vr_shell/vr_shell.h

Index: chrome/browser/android/vr_shell/vr_shell.h
diff --git a/chrome/browser/android/vr_shell/vr_shell.h b/chrome/browser/android/vr_shell/vr_shell.h
index 012a384b2760ee98ac3c0bf8ce8b680244e4c621..0697568a4c1d54814bce7140b3435277912ab7e1 100644
--- a/chrome/browser/android/vr_shell/vr_shell.h
+++ b/chrome/browser/android/vr_shell/vr_shell.h
@@ -94,13 +94,18 @@ class VrShell : public device::GvrDelegate {
  private:
   virtual ~VrShell();
   void LoadUIContent();
+  bool IsUiTextureReady();
+  Rectf MakeUiGlCopyRect(Recti pixel_rect);
   void DrawVrShell();
   void DrawEye(const gvr::Mat4f& view_matrix,
                const gvr::BufferViewport& params);
-  void DrawContentRect();
-  void DrawWebVr();
   void DrawUI();
   void DrawCursor();
+  void DrawWebVr();
+  void DrawWebVrOverlay(int64_t present_time_nanos);
+  void DrawWebVrEye(const gvr::Mat4f& view_matrix,
+                    const gvr::BufferViewport& params,
+                    int64_t present_time_nanos);
 
   void UpdateController();
 
@@ -152,7 +157,8 @@ class VrShell : public device::GvrDelegate {
   int ui_tex_height_ = 0;
 
   bool webvr_mode_ = false;
-  bool webvr_secure_origin_;
+  bool webvr_secure_origin_ = false;
+  int64_t webvr_warning_end_nanos_ = 0;
 
   base::WeakPtrFactory<VrShell> weak_ptr_factory_;