Skip drawing unsupported layers in forced software mode

cc/layers/tiled_layer_impl.cc

Index: cc/layers/tiled_layer_impl.cc
diff --git a/cc/layers/tiled_layer_impl.cc b/cc/layers/tiled_layer_impl.cc
index 4489d8524a11cdfca1eb1a2dcdfca483096c5f00..41f65f1869219b818ec832740fc0a411fd17284e 100644
--- a/cc/layers/tiled_layer_impl.cc
+++ b/cc/layers/tiled_layer_impl.cc
@@ -155,6 +155,13 @@ void TiledLayerImpl::PushPropertiesTo(LayerImpl* layer) {
   }
 }
 
+bool TiledLayerImpl::WillDraw(DrawMode draw_mode,
+                              ResourceProvider* resource_provider) {
+  if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
+    return false;
+  return LayerImpl::WillDraw(draw_mode, resource_provider);
+}
+
 void TiledLayerImpl::AppendQuads(QuadSink* quad_sink,
                                  AppendQuadsData* append_quads_data) {
   gfx::Rect content_rect = visible_content_rect();