Skip drawing unsupported layers in forced software mode

cc/layers/picture_layer_impl.h

 // 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.
 
 #ifndef CC_LAYERS_PICTURE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 57 matching lines @@
 
   void CreateTilingSet();
   void TransferTilingSet(scoped_ptr<PictureLayerTilingSet> tilings);
 
   // Mask-related functions
   void SetIsMask(bool is_mask);
   virtual ResourceProvider::ResourceId ContentsResourceId() const OVERRIDE;
 
   virtual size_t GPUMemoryUsageInBytes() const OVERRIDE;
 
+  virtual bool CanDrawInTilelessSoftwareMode() const OVERRIDE;
+
  protected:
   PictureLayerImpl(LayerTreeImpl* tree_impl, int id);
   PictureLayerTiling* AddTiling(float contents_scale);
   void RemoveTiling(float contents_scale);
   void SyncFromActiveLayer(const PictureLayerImpl* other);
   void ManageTilings(bool animating_transform_to_screen);
   virtual bool ShouldAdjustRasterScale(
       bool animating_transform_to_screen) const;
   virtual void CalculateRasterContentsScale(
       bool animating_transform_to_screen,
@@ skipping 38 matching lines @@
   bool raster_source_scale_was_animating_;
   bool is_using_lcd_text_;
 
   friend class PictureLayer;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_