Hook up insecure content warnings for http webVR presentation.

chrome/browser/android/vr_shell/vr_shell_gl.cc

Index: chrome/browser/android/vr_shell/vr_shell_gl.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell_gl.cc b/chrome/browser/android/vr_shell/vr_shell_gl.cc
index 05a6c98fdd8852cc1aff038d50e06eef49145280..724083d5c9cf0fcdf89e7b33ebd712af0744580e 100644
--- a/chrome/browser/android/vr_shell/vr_shell_gl.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_gl.cc
@@ -294,6 +294,8 @@ void VrShellGl::InitializeGl(gfx::AcceleratedWidget window) {
 
   InitializeRenderer();
 
+  scene_->OnGLInitialized();
+
   gfx::Size webvr_size =
       device::GvrDelegate::GetRecommendedWebVrSize(gvr_api_.get());
   DVLOG(1) << __FUNCTION__ << ": resize initial to " << webvr_size.width()
@@ -994,18 +996,13 @@ void VrShellGl::DrawElements(const vr::Mat4f& view_proj_matrix,
     vr::MatrixMul(view_proj_matrix, rect->TransformMatrix(), &transform);
 
     switch (rect->fill) {
-      case Fill::SKIA: {
-        break;
-      }
       case Fill::OPAQUE_GRADIENT: {
-        vr_shell_renderer_->GetTexturedQuadRenderer()->Flush();
         vr_shell_renderer_->GetGradientQuadRenderer()->Draw(
             transform, rect->edge_color, rect->center_color,
             rect->computed_opacity);
         break;
       }
       case Fill::GRID_GRADIENT: {
-        vr_shell_renderer_->GetTexturedQuadRenderer()->Flush();
         vr_shell_renderer_->GetGradientGridRenderer()->Draw(
             transform, rect->edge_color, rect->center_color,
             rect->gridline_count, rect->computed_opacity);
@@ -1013,16 +1010,19 @@ void VrShellGl::DrawElements(const vr::Mat4f& view_proj_matrix,
       }
       case Fill::CONTENT: {
         gfx::RectF copy_rect(0, 0, 1, 1);
-        vr_shell_renderer_->GetTexturedQuadRenderer()->AddQuad(
+        vr_shell_renderer_->GetTexturedQuadRenderer()->Draw(
             content_texture_id_, transform, copy_rect, rect->computed_opacity);
         break;
       }
+      case Fill::SELF: {
+        rect->Render(vr_shell_renderer_.get(), transform);
+        break;
+      }
       default:
         break;
     }
   }
-
-  vr_shell_renderer_->GetTexturedQuadRenderer()->Flush();
+  vr_shell_renderer_->Flush();
 }
 
 std::vector<const UiElement*> VrShellGl::GetElementsInDrawOrder(