cc: Support on demand raster with ganesh

cc/output/direct_renderer.cc

Index: cc/output/direct_renderer.cc
diff --git a/cc/output/direct_renderer.cc b/cc/output/direct_renderer.cc
index 08fe2571d3975654812554a20f120fa3223add85..a4d58b40553603e462bf415bd47c07cf465f2345 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -416,30 +416,7 @@ bool DirectRenderer::UseRenderPass(DrawingFrame* frame,
 }
 
 void DirectRenderer::RunOnDemandRasterTask(Task* on_demand_raster_task) {
-  TaskGraphRunner* task_graph_runner = RasterWorkerPool::GetTaskGraphRunner();
-  DCHECK(task_graph_runner);
-
-  // Make sure we have a unique task namespace token.
-  if (!on_demand_task_namespace_.IsValid())
-    on_demand_task_namespace_ = task_graph_runner->GetNamespaceToken();
-
-  // Construct a task graph that contains this single raster task.
-  TaskGraph graph;
-  graph.nodes.push_back(
-      TaskGraph::Node(on_demand_raster_task,
-                      RasterWorkerPool::kOnDemandRasterTaskPriority,
-                      0u));
-
-  // Schedule task and wait for task graph runner to finish running it.
-  task_graph_runner->ScheduleTasks(on_demand_task_namespace_, &graph);
-  task_graph_runner->WaitForTasksToFinishRunning(on_demand_task_namespace_);
-
-  // Collect task now that it has finished running.
-  Task::Vector completed_tasks;
-  task_graph_runner->CollectCompletedTasks(on_demand_task_namespace_,
-                                           &completed_tasks);
-  DCHECK_EQ(1u, completed_tasks.size());
-  DCHECK_EQ(completed_tasks[0], on_demand_raster_task);
+  client_->RunOnDemandRasterTask(on_demand_raster_task);
 }
 
 bool DirectRenderer::HasAllocatedResourcesForTesting(RenderPass::Id id)