cc: Support on demand raster with ganesh

cc/output/software_renderer.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/output/software_renderer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
@@ skipping 371 matching lines @@
   // (http://crbug.com/280374).
   skia::RefPtr<SkDrawFilter> opacity_filter =
       skia::AdoptRef(new skia::OpacityDrawFilter(
           quad->opacity(), frame->disable_picture_quad_image_filtering));
   DCHECK(!current_canvas_->getDrawFilter());
   current_canvas_->setDrawFilter(opacity_filter.get());
 
   TRACE_EVENT0("cc",
                "SoftwareRenderer::DrawPictureQuad");
 
-  // Create and run on-demand raster task for tile.
-  scoped_refptr<Task> on_demand_raster_task(
-      new OnDemandRasterTaskImpl(quad->picture_pile,
-                                 current_canvas_,
-                                 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,
+                                   current_canvas_,
+                                   quad->content_rect,
+                                   quad->contents_scale));
+    RunOnDemandRasterTask(on_demand_raster_task.get());
+  } else {
+    quad->picture_pile->RasterDirect(
+        current_canvas_, quad->content_rect, quad->contents_scale, NULL);
+  }
 
   current_canvas_->setDrawFilter(NULL);
 }
 
 void SoftwareRenderer::DrawSolidColorQuad(const DrawingFrame* frame,
                                           const SolidColorDrawQuad* quad) {
   gfx::RectF visible_quad_vertex_rect = MathUtil::ScaleRectProportional(
       QuadVertexRect(), quad->rect, quad->visible_rect);
   current_paint_.setColor(quad->color);
   current_paint_.setAlpha(quad->opacity() * SkColorGetA(quad->color));
@@ skipping 236 matching lines @@
 }
 
 void SoftwareRenderer::DidChangeVisibility() {
   if (visible())
     EnsureBackbuffer();
   else
     DiscardBackbuffer();
 }
 
 }  // namespace cc