cc: Remove all traces of SkPicture cloning.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index e39fee0362da621b522c4e892a75e7c0d6baf579..1ea1b6294a1327229fe167d9a6e4629764dccc7f 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -222,7 +222,6 @@ LayerTreeHostImpl::LayerTreeHostImpl(
     : client_(client),
       proxy_(proxy),
       use_gpu_rasterization_(false),
-      on_demand_task_graph_runner_(NULL),
       input_handler_client_(NULL),
       did_lock_scrolling_layer_(false),
       should_bubble_scrolls_(false),
@@ -1991,7 +1990,6 @@ void LayerTreeHostImpl::CreateAndSetTileManager() {
         GpuRasterWorkerPool::Create(proxy_->ImplThreadTaskRunner(),
                                     context_provider,
                                     resource_provider_.get());
-    on_demand_task_graph_runner_ = &synchronous_task_graph_runner_;
   } else if (UseOneCopyTextureUpload() && context_provider) {
     // We need to create a staging resource pool when using copy rasterizer.
     staging_resource_pool_ =
@@ -2009,7 +2007,6 @@ void LayerTreeHostImpl::CreateAndSetTileManager() {
         context_provider,
         resource_provider_.get(),
         staging_resource_pool_.get());
-    on_demand_task_graph_runner_ = RasterWorkerPool::GetTaskGraphRunner();
   } else if (!UseZeroCopyTextureUpload() && context_provider) {
     resource_pool_ = ResourcePool::Create(
         resource_provider_.get(),
@@ -2022,7 +2019,6 @@ void LayerTreeHostImpl::CreateAndSetTileManager() {
         context_provider,
         resource_provider_.get(),
         transfer_buffer_memory_limit_);
-    on_demand_task_graph_runner_ = RasterWorkerPool::GetTaskGraphRunner();
   } else {
     resource_pool_ =
         ResourcePool::Create(resource_provider_.get(),
@@ -2033,7 +2029,6 @@ void LayerTreeHostImpl::CreateAndSetTileManager() {
         ImageRasterWorkerPool::Create(proxy_->ImplThreadTaskRunner(),
                                       RasterWorkerPool::GetTaskGraphRunner(),
                                       resource_provider_.get());
-    on_demand_task_graph_runner_ = RasterWorkerPool::GetTaskGraphRunner();
   }
 
   tile_manager_ =
@@ -2045,7 +2040,6 @@ void LayerTreeHostImpl::CreateAndSetTileManager() {
 
   UpdateTileManagerMemoryPolicy(ActualManagedMemoryPolicy());
   need_to_update_visible_tiles_before_draw_ = false;
-  on_demand_task_namespace_ = on_demand_task_graph_runner_->GetNamespaceToken();
 }
 
 void LayerTreeHostImpl::DestroyTileManager() {
@@ -2968,34 +2962,6 @@ void LayerTreeHostImpl::SetFullRootLayerDamage() {
   SetViewportDamage(gfx::Rect(DrawViewportSize()));
 }
 
-void LayerTreeHostImpl::RunOnDemandRasterTask(Task* on_demand_raster_task) {
-  DCHECK(on_demand_task_graph_runner_);
-
-  // 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.
-  on_demand_task_graph_runner_->ScheduleTasks(on_demand_task_namespace_,
-                                              &graph);
-
-  if (on_demand_task_graph_runner_ == &synchronous_task_graph_runner_)
-    on_demand_task_graph_runner_->RunUntilIdle();
-
-  on_demand_task_graph_runner_->WaitForTasksToFinishRunning(
-      on_demand_task_namespace_);
-
-  // Collect task now that it has finished running.
-  Task::Vector completed_tasks;
-  on_demand_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);
-}
-
 void LayerTreeHostImpl::ScrollViewportBy(gfx::Vector2dF scroll_delta) {
   DCHECK(InnerViewportScrollLayer());
   LayerImpl* scroll_layer = OuterViewportScrollLayer()