cc: Support on demand raster with ganesh

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 80e866df07d723c3ba779737acccac9577f6b93e..0112cf07aa140275f410be23e44937a6971fc13f 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -1912,13 +1912,20 @@ void GLRenderer::DrawPictureQuad(const DrawingFrame* frame,
                                             quad->texture_format);
   }
 
-  // Create and run on-demand raster task for tile.
-  scoped_refptr<Task> on_demand_raster_task(
-      new OnDemandRasterTaskImpl(quad->picture_pile,
-                                 &on_demand_tile_raster_bitmap_,
-                                 quad->content_rect,
-                                 quad->contents_scale));
-  RunOnDemandRasterTask(on_demand_raster_task.get());
+  if (client_->UseTaskGraphRunnerForOnDemandRaster()) {
+    // Create and run on-demand raster task for tile.
+    scoped_refptr<Task> on_demand_raster_task(
+        new OnDemandRasterTaskImpl(quad->picture_pile,
+                                   &on_demand_tile_raster_bitmap_,
+                                   quad->content_rect,
+                                   quad->contents_scale));
+    RunOnDemandRasterTask(on_demand_raster_task.get());
+  } else {
+    SkBitmapDevice device(on_demand_tile_raster_bitmap_);
+    SkCanvas canvas(&device);
+    quad->picture_pile->RasterToBitmap(
+        &canvas, quad->content_rect, quad->contents_scale, NULL);
+  }
 
   uint8_t* bitmap_pixels = NULL;
   SkBitmap on_demand_tile_raster_bitmap_dest;