aura: Add Layer::LAYER_SOLID_COLOR to compositor.

ash/wm/image_grid.cc

Index: ash/wm/image_grid.cc
diff --git a/ash/wm/image_grid.cc b/ash/wm/image_grid.cc
index 89d3054c48701a7da8803346c7455cb4c5efa7f4..de4ec4a84ff4d2b6ddc261b69cf133653e1a66ec 100644
--- a/ash/wm/image_grid.cc
+++ b/ash/wm/image_grid.cc
@@ -48,7 +48,7 @@ void ImageGrid::Init(const gfx::Image* top_left_image,
                      const gfx::Image* bottom_left_image,
                      const gfx::Image* bottom_image,
                      const gfx::Image* bottom_right_image) {
-  layer_.reset(new ui::Layer(ui::Layer::LAYER_HAS_NO_TEXTURE));
+  layer_.reset(new ui::Layer(ui::Layer::LAYER_NOT_DRAWN));
 
   InitImage(top_left_image, &top_left_layer_, &top_left_painter_);
   InitImage(top_image, &top_layer_, &top_painter_);
@@ -230,7 +230,7 @@ void ImageGrid::InitImage(const gfx::Image* image,
   if (!image)
     return;
 
-  layer_ptr->reset(new ui::Layer(ui::Layer::LAYER_HAS_TEXTURE));
+  layer_ptr->reset(new ui::Layer(ui::Layer::LAYER_TEXTURED));
 
   const gfx::Size size = GetImageSize(image);
   layer_ptr->get()->SetBounds(gfx::Rect(0, 0, size.width(), size.height()));