Skip drawing unsupported layers in forced software mode

cc/layers/layer_impl.h

 // Copyright 2011 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.
 
 #ifndef CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <string>
 
 #include "base/logging.h"
@@ skipping 401 matching lines @@
   virtual bool CanClipSelf() const;
 
   virtual bool AreVisibleResourcesReady() const;
 
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl);
   virtual void PushPropertiesTo(LayerImpl* layer);
 
   scoped_ptr<base::Value> AsValue() const;
   virtual size_t GPUMemoryUsageInBytes() const;
 
+  virtual bool CanDrawInTilelessSoftwareMode() const;
+
  protected:
   LayerImpl(LayerTreeImpl* layer_impl, int id);
 
   // Get the color and size of the layer's debug border.
   virtual void GetDebugBorderProperties(SkColor* color, float* width) const;
 
   void AppendDebugBorderQuad(QuadSink* quad_sink,
                              const SharedQuadState* shared_quad_state,
                              AppendQuadsData* append_quads_data) const;
   void AppendDebugBorderQuad(QuadSink* quad_sink,
@@ skipping 123 matching lines @@
   // Group of properties that need to be computed based on the layer tree
   // hierarchy before layers can be drawn.
   DrawProperties<LayerImpl, RenderSurfaceImpl> draw_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_