cc: Remove the base RasterSource

cc/layers/picture_layer.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/picture_layer.h"
 
 #include "base/auto_reset.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/playback/display_list_recording_source.h"
@@ skipping 56 matching lines @@
     // Update may not get called for the layer (if it's not in the viewport
     // for example, even though it has resized making the recording source no
     // longer valid. In this case just destroy the recording source.
     recording_source_->SetEmptyBounds();
   }
 
   layer_impl->SetNearestNeighbor(nearest_neighbor_);
 
   // Preserve lcd text settings from the current raster source.
   bool can_use_lcd_text = layer_impl->RasterSourceUsesLCDText();
-  scoped_refptr<RasterSource> raster_source =
+  scoped_refptr<DisplayListRasterSource> raster_source =
       recording_source_->CreateRasterSource(can_use_lcd_text);
   layer_impl->set_gpu_raster_max_texture_size(
       layer_tree_host()->device_viewport_size());
   layer_impl->UpdateRasterSource(raster_source, &recording_invalidation_,
                                  nullptr);
   DCHECK(recording_invalidation_.IsEmpty());
 }
 
 void PictureLayer::SetLayerTreeHost(LayerTreeHost* host) {
   Layer::SetLayerTreeHost(host);
@@ skipping 88 matching lines @@
     return skia::RefPtr<SkPicture>();
 
   gfx::Size layer_size = bounds();
   scoped_ptr<DisplayListRecordingSource> recording_source(
       new DisplayListRecordingSource);
   Region recording_invalidation;
   recording_source->UpdateAndExpandInvalidation(
       client_, &recording_invalidation, layer_size, gfx::Rect(layer_size),
       update_source_frame_number_, DisplayListRecordingSource::RECORD_NORMALLY);
 
-  scoped_refptr<RasterSource> raster_source =
+  scoped_refptr<DisplayListRasterSource> raster_source =
       recording_source->CreateRasterSource(false);
 
   return raster_source->GetFlattenedPicture();
 }
 
 bool PictureLayer::IsSuitableForGpuRasterization() const {
   return recording_source_->IsSuitableForGpuRasterization();
 }
 
 void PictureLayer::ClearClient() {
@@ skipping 11 matching lines @@
 
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc