Skip drawing unsupported layers in forced software mode

cc/layers/delegated_renderer_layer_impl.cc

 // Copyright 2012 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.
 
 #include "cc/layers/delegated_renderer_layer_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 237 matching lines @@
         ConvertDelegatedRenderPassId(render_passes_in_draw_order_[i]->id);
 
     // Don't clash with the RenderPass we generate if we own a RenderSurface.
     DCHECK_GT(output_render_pass_id.index, 0);
 
     render_pass_sink->AppendRenderPass(
         render_passes_in_draw_order_[i]->Copy(output_render_pass_id));
   }
 }
 
+bool DelegatedRendererLayerImpl::WillDraw(DrawMode draw_mode,
+                                          ResourceProvider* resource_provider) {
+  if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
+    return false;
+  return LayerImpl::WillDraw(draw_mode, resource_provider);
+}
+
 void DelegatedRendererLayerImpl::AppendQuads(
     QuadSink* quad_sink,
     AppendQuadsData* append_quads_data) {
   AppendRainbowDebugBorder(quad_sink, append_quads_data);
 
   if (render_passes_in_draw_order_.empty())
     return;
 
   RenderPass::Id target_render_pass_id = append_quads_data->render_pass_id;
 
@@ skipping 195 matching lines @@
 
   if (own_child_id_) {
     ResourceProvider* provider = layer_tree_impl()->resource_provider();
     provider->DestroyChild(child_id_);
   }
 
   child_id_ = 0;
 }
 
 }  // namespace cc